From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785433324811.6396357541789; Fri, 26 May 2017 00:57:13 -0700 (PDT) Received: from localhost ([::1]:35371 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA7S-0007Kt-SL for importer@patchew.org; Fri, 26 May 2017 03:57:10 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54056) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3N-00041g-3a for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3K-00063g-Mm for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41352) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3K-00063a-Gz for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:54 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6A9066371; Fri, 26 May 2017 07:52:53 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id E47295C883; Fri, 26 May 2017 07:52:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 6A9066371 Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 6A9066371 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:25 +0800 Message-Id: <20170526075246.20265-2-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 26 May 2017 07:52:53 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 01/22] docker: Run tests with current user X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" We've used --add-current-user to create a user in the image, use it to run tests, because root has too much priviledge, and can surprise test cases. Signed-off-by: Fam Zheng Message-Id: <20170505032340.26467-2-famz@redhat.com> Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Paolo Bonzini Signed-off-by: Fam Zheng --- tests/docker/Makefile.include | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include index 03eda37..0ed8c3d 100644 --- a/tests/docker/Makefile.include +++ b/tests/docker/Makefile.include @@ -126,7 +126,7 @@ docker-run: docker-qemu-src " COPYING $(EXECUTABLE) to $(IMAGE)")) $(call quiet-command, \ $(SRC_PATH)/tests/docker/docker.py run \ - -t \ + $(if $(NOUSER),,-u $(shell id -u)) -t \ $(if $V,,--rm) \ $(if $(DEBUG),-i,--net=3Dnone) \ -e TARGET_LIST=3D$(TARGET_LIST) \ --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785283050556.1342784592011; Fri, 26 May 2017 00:54:43 -0700 (PDT) Received: from localhost ([::1]:35357 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA53-0005CH-LN for importer@patchew.org; Fri, 26 May 2017 03:54:41 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54078) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3O-00041q-QU for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3O-00064H-0q for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41480) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3N-00063u-Qs for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:57 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A47CA4E359; Fri, 26 May 2017 07:52:56 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id EE56B5C888; Fri, 26 May 2017 07:52:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com A47CA4E359 Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com A47CA4E359 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:26 +0800 Message-Id: <20170526075246.20265-3-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 26 May 2017 07:52:56 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 02/22] docker: Add bzip2 and hostname to fedora image X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" It is used by qemu-iotests. Signed-off-by: Fam Zheng Message-Id: <20170505032340.26467-3-famz@redhat.com> Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Paolo Bonzini Signed-off-by: Fam Zheng --- tests/docker/dockerfiles/fedora.docker | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/docker/dockerfiles/fedora.docker b/tests/docker/dockerfi= les/fedora.docker index c4f80ad..39f6b58 100644 --- a/tests/docker/dockerfiles/fedora.docker +++ b/tests/docker/dockerfiles/fedora.docker @@ -1,6 +1,6 @@ FROM fedora:latest ENV PACKAGES \ - ccache git tar PyYAML sparse flex bison python2 \ + ccache git tar PyYAML sparse flex bison python2 bzip2 hostname \ glib2-devel pixman-devel zlib-devel SDL-devel libfdt-devel \ gcc gcc-c++ clang make perl which bc findutils \ mingw32-pixman mingw32-glib2 mingw32-gmp mingw32-SDL mingw32-pkg-confi= g \ --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785285378191.89613356136965; Fri, 26 May 2017 00:54:45 -0700 (PDT) Received: from localhost ([::1]:35358 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA56-0005EI-2m for importer@patchew.org; Fri, 26 May 2017 03:54:44 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54090) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3Q-00042e-Fu for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3P-00065n-Qo for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39074) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3P-00065R-Kq for qemu-devel@nongnu.org; Fri, 26 May 2017 03:52:59 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 80FED80045; Fri, 26 May 2017 07:52:58 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 28DCC5C3FD; Fri, 26 May 2017 07:52:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 80FED80045 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 80FED80045 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:27 +0800 Message-Id: <20170526075246.20265-4-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:52:58 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 03/22] docker: Add libaio to fedora image X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Fam Zheng Message-Id: <20170505032340.26467-5-famz@redhat.com> Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Paolo Bonzini Signed-off-by: Fam Zheng --- tests/docker/dockerfiles/fedora.docker | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/docker/dockerfiles/fedora.docker b/tests/docker/dockerfi= les/fedora.docker index 39f6b58..4eaa8ed 100644 --- a/tests/docker/dockerfiles/fedora.docker +++ b/tests/docker/dockerfiles/fedora.docker @@ -2,7 +2,7 @@ FROM fedora:latest ENV PACKAGES \ ccache git tar PyYAML sparse flex bison python2 bzip2 hostname \ glib2-devel pixman-devel zlib-devel SDL-devel libfdt-devel \ - gcc gcc-c++ clang make perl which bc findutils \ + gcc gcc-c++ clang make perl which bc findutils libaio-devel \ mingw32-pixman mingw32-glib2 mingw32-gmp mingw32-SDL mingw32-pkg-confi= g \ mingw32-gtk2 mingw32-gtk3 mingw32-gnutls mingw32-nettle mingw32-libtas= n1 \ mingw32-libjpeg-turbo mingw32-libpng mingw32-curl mingw32-libssh2 \ --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785431513521.2197622096785; Fri, 26 May 2017 00:57:11 -0700 (PDT) Received: from localhost ([::1]:35370 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA7S-0007Kr-58 for importer@patchew.org; Fri, 26 May 2017 03:57:10 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54102) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3T-00045C-Dc for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3S-000667-IS for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57360) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3S-000661-CE for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:02 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 31A48624C6; Fri, 26 May 2017 07:53:01 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id E71465C883; Fri, 26 May 2017 07:52:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 31A48624C6 Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 31A48624C6 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:28 +0800 Message-Id: <20170526075246.20265-5-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 26 May 2017 07:53:01 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 04/22] docker: Add flex and bison to centos6 image X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Currently there are warnings about flex and bison being missing when building in the centos6 image: make[1]: flex: Command not found BISON dtc-parser.tab.c make[1]: bison: Command not found Add them. Reported-by: Thomas Huth Signed-off-by: Fam Zheng Message-Id: <20170524005206.31916-1-famz@redhat.com> Reviewed-by: Alex Benn=C3=A9e Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Fam Zheng --- tests/docker/dockerfiles/centos6.docker | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/docker/dockerfiles/centos6.docker b/tests/docker/dockerf= iles/centos6.docker index 34e0d3b..17a4d24 100644 --- a/tests/docker/dockerfiles/centos6.docker +++ b/tests/docker/dockerfiles/centos6.docker @@ -1,7 +1,7 @@ FROM centos:6 RUN yum install -y epel-release ENV PACKAGES libfdt-devel ccache \ - tar git make gcc g++ \ + tar git make gcc g++ flex bison \ zlib-devel glib2-devel SDL-devel pixman-devel \ epel-release RUN yum install -y $PACKAGES --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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Fri, 26 May 2017 03:53:06 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 12D888004F; Fri, 26 May 2017 07:53:05 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8A4525C883; Fri, 26 May 2017 07:53:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 12D888004F Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 12D888004F From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:29 +0800 Message-Id: <20170526075246.20265-6-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:53:05 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 05/22] block: access copy_on_read with atomic ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-2-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block.c | 6 ++++-- block/io.c | 8 ++++---- blockdev.c | 2 +- include/block/block_int.h | 11 ++++++----- 4 files changed, 15 insertions(+), 12 deletions(-) diff --git a/block.c b/block.c index 50ba264..f6066ef 100644 --- a/block.c +++ b/block.c @@ -1260,7 +1260,9 @@ static int bdrv_open_common(BlockDriverState *bs, Blo= ckBackend *file, goto fail_opts; } =20 - assert(bs->copy_on_read =3D=3D 0); /* bdrv_new() and bdrv_close() make= it so */ + /* bdrv_new() and bdrv_close() make it so */ + assert(atomic_read(&bs->copy_on_read) =3D=3D 0); + if (bs->open_flags & BDRV_O_COPY_ON_READ) { if (!bs->read_only) { bdrv_enable_copy_on_read(bs); @@ -3023,7 +3025,7 @@ static void bdrv_close(BlockDriverState *bs) =20 g_free(bs->opaque); bs->opaque =3D NULL; - bs->copy_on_read =3D 0; + atomic_set(&bs->copy_on_read, 0); bs->backing_file[0] =3D '\0'; bs->backing_format[0] =3D '\0'; bs->total_sectors =3D 0; diff --git a/block/io.c b/block/io.c index fdd7485..80a3a8c 100644 --- a/block/io.c +++ b/block/io.c @@ -129,13 +129,13 @@ void bdrv_refresh_limits(BlockDriverState *bs, Error = **errp) */ void bdrv_enable_copy_on_read(BlockDriverState *bs) { - bs->copy_on_read++; + atomic_inc(&bs->copy_on_read); } =20 void bdrv_disable_copy_on_read(BlockDriverState *bs) { - assert(bs->copy_on_read > 0); - bs->copy_on_read--; + int old =3D atomic_fetch_dec(&bs->copy_on_read); + assert(old >=3D 1); } =20 /* Check if any requests are in-flight (including throttled requests) */ @@ -1157,7 +1157,7 @@ int coroutine_fn bdrv_co_preadv(BdrvChild *child, bdrv_inc_in_flight(bs); =20 /* Don't do copy-on-read if we read data before write operation */ - if (bs->copy_on_read && !(flags & BDRV_REQ_NO_SERIALISING)) { + if (atomic_read(&bs->copy_on_read) && !(flags & BDRV_REQ_NO_SERIALISIN= G)) { flags |=3D BDRV_REQ_COPY_ON_READ; } =20 diff --git a/blockdev.c b/blockdev.c index c63f4e8..a2fa9f7 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1791,7 +1791,7 @@ static void external_snapshot_commit(BlkActionState *= common) /* We don't need (or want) to use the transactional * bdrv_reopen_multiple() across all the entries at once, because we * don't want to abort all of them if one of them fails the reopen */ - if (!state->old_bs->copy_on_read) { + if (!atomic_read(&state->old_bs->copy_on_read)) { bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDW= R, NULL); } diff --git a/include/block/block_int.h b/include/block/block_int.h index 8d3724c..c71492a 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -595,11 +595,6 @@ struct BlockDriverState { =20 /* Protected by AioContext lock */ =20 - /* If true, copy read backing sectors into image. Can be >1 if more - * than one client has requested copy-on-read. - */ - int copy_on_read; - /* If we are reading a disk image, give its size in sectors. * Generally read-only; it is written to by load_vmstate and save_vmst= ate, * but the block layer is quiescent during those. @@ -633,6 +628,12 @@ struct BlockDriverState { =20 QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps; =20 + /* If true, copy read backing sectors into image. Can be >1 if more + * than one client has requested copy-on-read. Accessed with atomic + * ops. + */ + int copy_on_read; + /* do we need to tell the quest if we have a volatile write cache? */ int enable_write_cache; =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785441101638.4543551514455; Fri, 26 May 2017 00:57:21 -0700 (PDT) Received: from localhost ([::1]:35372 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA7b-0007TQ-Jq for importer@patchew.org; Fri, 26 May 2017 03:57:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54142) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3c-0004D2-HU for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3b-00069G-JW for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60472) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3b-00068u-DF for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:11 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4C18E3DE3D; Fri, 26 May 2017 07:53:10 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E2CB17508; Fri, 26 May 2017 07:53:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 4C18E3DE3D Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 4C18E3DE3D From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:30 +0800 Message-Id: <20170526075246.20265-7-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 26 May 2017 07:53:10 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 06/22] block: access quiesce_counter with atomic ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Reviewed-by: Alberto Garcia Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-3-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/io.c | 4 ++-- include/block/block_int.h | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/block/io.c b/block/io.c index 80a3a8c..7d31946 100644 --- a/block/io.c +++ b/block/io.c @@ -240,7 +240,7 @@ void bdrv_drained_begin(BlockDriverState *bs) return; } =20 - if (!bs->quiesce_counter++) { + if (atomic_fetch_inc(&bs->quiesce_counter) =3D=3D 0) { aio_disable_external(bdrv_get_aio_context(bs)); bdrv_parent_drained_begin(bs); } @@ -251,7 +251,7 @@ void bdrv_drained_begin(BlockDriverState *bs) void bdrv_drained_end(BlockDriverState *bs) { assert(bs->quiesce_counter > 0); - if (--bs->quiesce_counter > 0) { + if (atomic_fetch_dec(&bs->quiesce_counter) > 1) { return; } =20 diff --git a/include/block/block_int.h b/include/block/block_int.h index c71492a..4af44df 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -637,6 +637,7 @@ struct BlockDriverState { /* do we need to tell the quest if we have a volatile write cache? */ int enable_write_cache; =20 + /* Accessed with atomic ops. */ int quiesce_counter; }; =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785585093880.0882016137346; Fri, 26 May 2017 00:59:45 -0700 (PDT) Received: from localhost ([::1]:35380 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA9v-0002UD-Cj for importer@patchew.org; Fri, 26 May 2017 03:59:43 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54174) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3h-0004I0-St for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3d-0006A4-Un for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:2975) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3d-00069m-OJ for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:13 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9888680C06; Fri, 26 May 2017 07:53:12 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1C3455C883; Fri, 26 May 2017 07:53:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 9888680C06 Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 9888680C06 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:31 +0800 Message-Id: <20170526075246.20265-8-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 26 May 2017 07:53:12 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 07/22] block: access io_limits_disabled with atomic ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Reviewed-by: Alberto Garcia Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-4-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/block-backend.c | 4 ++-- block/throttle-groups.c | 2 +- include/sysemu/block-backend.h | 3 ++- 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/block/block-backend.c b/block/block-backend.c index f3a6008..e50ec03 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1953,7 +1953,7 @@ static void blk_root_drained_begin(BdrvChild *child) /* Note that blk->root may not be accessible here yet if we are just * attaching to a BlockDriverState that is drained. Use child instead.= */ =20 - if (blk->public.io_limits_disabled++ =3D=3D 0) { + if (atomic_fetch_inc(&blk->public.io_limits_disabled) =3D=3D 0) { throttle_group_restart_blk(blk); } } @@ -1964,7 +1964,7 @@ static void blk_root_drained_end(BdrvChild *child) assert(blk->quiesce_counter); =20 assert(blk->public.io_limits_disabled); - --blk->public.io_limits_disabled; + atomic_dec(&blk->public.io_limits_disabled); =20 if (--blk->quiesce_counter =3D=3D 0) { if (blk->dev_ops && blk->dev_ops->drained_end) { diff --git a/block/throttle-groups.c b/block/throttle-groups.c index b73e7a8..69bfbd4 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -240,7 +240,7 @@ static bool throttle_group_schedule_timer(BlockBackend = *blk, bool is_write) ThrottleGroup *tg =3D container_of(ts, ThrottleGroup, ts); bool must_wait; =20 - if (blkp->io_limits_disabled) { + if (atomic_read(&blkp->io_limits_disabled)) { return false; } =20 diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 840ad61..24b63d6 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -80,7 +80,8 @@ typedef struct BlockBackendPublic { CoQueue throttled_reqs[2]; =20 /* Nonzero if the I/O limits are currently being ignored; generally - * it is zero. */ + * it is zero. Accessed with atomic operations. + */ unsigned int io_limits_disabled; =20 /* The following fields are protected by the ThrottleGroup lock. --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785576147984.3779580615841; Fri, 26 May 2017 00:59:36 -0700 (PDT) Received: from localhost ([::1]:35379 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA9m-0002N5-QC for importer@patchew.org; Fri, 26 May 2017 03:59:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54175) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3h-0004I3-T5 for qemu-devel@nongnu.org; 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dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com AE47380515 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:32 +0800 Message-Id: <20170526075246.20265-9-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:53:14 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 08/22] block: access serialising_in_flight with atomic ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-5-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/io.c | 6 +++--- include/block/block_int.h | 10 ++++++---- 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/block/io.c b/block/io.c index 7d31946..cc5de2c 100644 --- a/block/io.c +++ b/block/io.c @@ -388,7 +388,7 @@ void bdrv_drain_all(void) static void tracked_request_end(BdrvTrackedRequest *req) { if (req->serialising) { - req->bs->serialising_in_flight--; + atomic_dec(&req->bs->serialising_in_flight); } =20 QLIST_REMOVE(req, list); @@ -427,7 +427,7 @@ static void mark_request_serialising(BdrvTrackedRequest= *req, uint64_t align) - overlap_offset; =20 if (!req->serialising) { - req->bs->serialising_in_flight++; + atomic_inc(&req->bs->serialising_in_flight); req->serialising =3D true; } =20 @@ -532,7 +532,7 @@ static bool coroutine_fn wait_serialising_requests(Bdrv= TrackedRequest *self) bool retry; bool waited =3D false; =20 - if (!bs->serialising_in_flight) { + if (!atomic_read(&bs->serialising_in_flight)) { return false; } =20 diff --git a/include/block/block_int.h b/include/block/block_int.h index 4af44df..2fafd65 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -604,10 +604,6 @@ struct BlockDriverState { /* Callback before write request is processed */ NotifierWithReturnList before_write_notifiers; =20 - /* number of in-flight requests; overall and serialising */ - unsigned int in_flight; - unsigned int serialising_in_flight; - bool wakeup; =20 /* Offset after the highest byte written to */ @@ -634,6 +630,12 @@ struct BlockDriverState { */ int copy_on_read; =20 + /* number of in-flight requests; overall and serialising. + * Accessed with atomic ops. + */ + unsigned int in_flight; + unsigned int serialising_in_flight; + /* do we need to tell the quest if we have a volatile write cache? */ int enable_write_cache; =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785737137241.9615839728906; Fri, 26 May 2017 01:02:17 -0700 (PDT) Received: from localhost ([::1]:35396 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEACN-0004cL-MJ for importer@patchew.org; Fri, 26 May 2017 04:02:15 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54192) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3j-0004JF-39 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3i-0006Be-7D for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:19 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39504) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3h-0006BF-UQ for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:18 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D13EA83F47; Fri, 26 May 2017 07:53:16 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 430B55C883; Fri, 26 May 2017 07:53:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com D13EA83F47 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com D13EA83F47 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:33 +0800 Message-Id: <20170526075246.20265-10-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:53:17 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 09/22] block: access wakeup with atomic ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-6-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/io.c | 3 ++- block/nfs.c | 4 +++- block/sheepdog.c | 3 ++- include/block/block.h | 5 +++-- include/block/block_int.h | 7 +++++-- 5 files changed, 15 insertions(+), 7 deletions(-) diff --git a/block/io.c b/block/io.c index cc5de2c..3a98b02 100644 --- a/block/io.c +++ b/block/io.c @@ -514,7 +514,8 @@ static void dummy_bh_cb(void *opaque) =20 void bdrv_wakeup(BlockDriverState *bs) { - if (bs->wakeup) { + /* The barrier (or an atomic op) is in the caller. */ + if (atomic_read(&bs->wakeup)) { aio_bh_schedule_oneshot(qemu_get_aio_context(), dummy_bh_cb, NULL); } } diff --git a/block/nfs.c b/block/nfs.c index 848b2c0..18c87d2 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -730,7 +730,9 @@ nfs_get_allocated_file_size_cb(int ret, struct nfs_cont= ext *nfs, void *data, if (task->ret < 0) { error_report("NFS Error: %s", nfs_get_error(nfs)); } - task->complete =3D 1; + + /* Set task->complete before reading bs->wakeup. */ + atomic_mb_set(&task->complete, 1); bdrv_wakeup(task->bs); } =20 diff --git a/block/sheepdog.c b/block/sheepdog.c index a18315a..5ebf5d9 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -698,7 +698,8 @@ out: =20 srco->co =3D NULL; srco->ret =3D ret; - srco->finished =3D true; + /* Set srco->finished before reading bs->wakeup. */ + atomic_mb_set(&srco->finished, true); if (srco->bs) { bdrv_wakeup(srco->bs); } diff --git a/include/block/block.h b/include/block/block.h index 9b355e9..a4f09df 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -402,7 +402,8 @@ void bdrv_drain_all(void); * block_job_defer_to_main_loop for how to do it). \ */ \ assert(!bs_->wakeup); \ - bs_->wakeup =3D true; \ + /* Set bs->wakeup before evaluating cond. */ \ + atomic_mb_set(&bs_->wakeup, true); \ while (busy_) { \ if ((cond)) { \ waited_ =3D busy_ =3D true; \ @@ -414,7 +415,7 @@ void bdrv_drain_all(void); waited_ |=3D busy_; \ } \ } \ - bs_->wakeup =3D false; \ + atomic_set(&bs_->wakeup, false); \ } \ waited_; }) =20 diff --git a/include/block/block_int.h b/include/block/block_int.h index 2fafd65..b690e58 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -604,8 +604,6 @@ struct BlockDriverState { /* Callback before write request is processed */ NotifierWithReturnList before_write_notifiers; =20 - bool wakeup; - /* Offset after the highest byte written to */ uint64_t wr_highest_offset; =20 @@ -636,6 +634,11 @@ struct BlockDriverState { unsigned int in_flight; unsigned int serialising_in_flight; =20 + /* Internal to BDRV_POLL_WHILE and bdrv_wakeup. Accessed with atomic + * ops. + */ + bool wakeup; + /* do we need to tell the quest if we have a volatile write cache? */ int enable_write_cache; =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785575413328.1596402796233; Fri, 26 May 2017 00:59:35 -0700 (PDT) Received: from localhost ([::1]:35378 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA9m-0002MK-3f for importer@patchew.org; Fri, 26 May 2017 03:59:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54203) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3k-0004L3-W1 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3k-0006CC-8T for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39562) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3k-0006C5-3G for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:20 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 027D58051A; Fri, 26 May 2017 07:53:19 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6815B5C883; Fri, 26 May 2017 07:53:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 027D58051A Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 027D58051A From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:34 +0800 Message-Id: <20170526075246.20265-11-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:53:19 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 10/22] block: access io_plugged with atomic ops X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-7-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/io.c | 4 ++-- include/block/block_int.h | 8 +++++--- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/block/io.c b/block/io.c index 3a98b02..f34d030 100644 --- a/block/io.c +++ b/block/io.c @@ -2658,7 +2658,7 @@ void bdrv_io_plug(BlockDriverState *bs) bdrv_io_plug(child->bs); } =20 - if (bs->io_plugged++ =3D=3D 0) { + if (atomic_fetch_inc(&bs->io_plugged) =3D=3D 0) { BlockDriver *drv =3D bs->drv; if (drv && drv->bdrv_io_plug) { drv->bdrv_io_plug(bs); @@ -2671,7 +2671,7 @@ void bdrv_io_unplug(BlockDriverState *bs) BdrvChild *child; =20 assert(bs->io_plugged); - if (--bs->io_plugged =3D=3D 0) { + if (atomic_fetch_dec(&bs->io_plugged) =3D=3D 1) { BlockDriver *drv =3D bs->drv; if (drv && drv->bdrv_io_unplug) { drv->bdrv_io_unplug(bs); diff --git a/include/block/block_int.h b/include/block/block_int.h index b690e58..d54ed75 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -611,9 +611,6 @@ struct BlockDriverState { uint64_t write_threshold_offset; NotifierWithReturn write_threshold_notifier; =20 - /* counter for nested bdrv_io_plug */ - unsigned io_plugged; - QLIST_HEAD(, BdrvTrackedRequest) tracked_requests; CoQueue flush_queue; /* Serializing flush queue */ bool active_flush_req; /* Flush request in flight? */ @@ -639,6 +636,11 @@ struct BlockDriverState { */ bool wakeup; =20 + /* counter for nested bdrv_io_plug. + * Accessed with atomic ops. + */ + unsigned io_plugged; + /* do we need to tell the quest if we have a volatile write cache? */ int enable_write_cache; =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785732044807.4035245289624; Fri, 26 May 2017 01:02:12 -0700 (PDT) Received: from localhost ([::1]:35395 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEACH-0004WC-H8 for importer@patchew.org; Fri, 26 May 2017 04:02:09 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54214) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3n-0004Nv-Gi for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3m-0006Cj-Iu for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42050) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3m-0006CY-AG for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:22 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3F51461980; Fri, 26 May 2017 07:53:21 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8CA535C883; Fri, 26 May 2017 07:53:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 3F51461980 Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 3F51461980 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:35 +0800 Message-Id: <20170526075246.20265-12-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 26 May 2017 07:53:21 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 11/22] throttle-groups: only start one coroutine from drained_begin X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Starting all waiting coroutines from bdrv_drain_all is unnecessary; throttle_group_co_io_limits_intercept calls schedule_next_request as soon as the coroutine restarts, which in turn will restart the next request if possible. If we only start the first request and let the coroutines dance from there the code is simpler and there is more reuse between throttle_group_config, throttle_group_restart_blk and timer_cb. The next patch will benefit from this. We also stop accessing from throttle_group_restart_blk the blkp->throttled_reqs CoQueues even when there was no attached throttling group. This worked but is not pretty. The only thing that can interrupt the dance is the QEMU_CLOCK_VIRTUAL timer when switching from one block device to the next, because the timer is set to "now + 1" but QEMU_CLOCK_VIRTUAL might not be running. Set that timer to point in the present ("now") rather than the future and things work. Reviewed-by: Alberto Garcia Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-8-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/throttle-groups.c | 45 +++++++++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 20 deletions(-) diff --git a/block/throttle-groups.c b/block/throttle-groups.c index 69bfbd4..85169ec 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -292,7 +292,7 @@ static void schedule_next_request(BlockBackend *blk, bo= ol is_write) } else { ThrottleTimers *tt =3D &blk_get_public(token)->throttle_timers; int64_t now =3D qemu_clock_get_ns(tt->clock_type); - timer_mod(tt->timers[is_write], now + 1); + timer_mod(tt->timers[is_write], now); tg->any_timer_armed[is_write] =3D true; } tg->tokens[is_write] =3D token; @@ -340,15 +340,32 @@ void coroutine_fn throttle_group_co_io_limits_interce= pt(BlockBackend *blk, qemu_mutex_unlock(&tg->lock); } =20 +static void throttle_group_restart_queue(BlockBackend *blk, bool is_write) +{ + BlockBackendPublic *blkp =3D blk_get_public(blk); + ThrottleGroup *tg =3D container_of(blkp->throttle_state, ThrottleGroup= , ts); + bool empty_queue; + + aio_context_acquire(blk_get_aio_context(blk)); + empty_queue =3D !qemu_co_enter_next(&blkp->throttled_reqs[is_write]); + aio_context_release(blk_get_aio_context(blk)); + + /* If the request queue was empty then we have to take care of + * scheduling the next one */ + if (empty_queue) { + qemu_mutex_lock(&tg->lock); + schedule_next_request(blk, is_write); + qemu_mutex_unlock(&tg->lock); + } +} + void throttle_group_restart_blk(BlockBackend *blk) { BlockBackendPublic *blkp =3D blk_get_public(blk); - int i; =20 - for (i =3D 0; i < 2; i++) { - while (qemu_co_enter_next(&blkp->throttled_reqs[i])) { - ; - } + if (blkp->throttle_state) { + throttle_group_restart_queue(blk, 0); + throttle_group_restart_queue(blk, 1); } } =20 @@ -376,8 +393,7 @@ void throttle_group_config(BlockBackend *blk, ThrottleC= onfig *cfg) throttle_config(ts, tt, cfg); qemu_mutex_unlock(&tg->lock); =20 - qemu_co_enter_next(&blkp->throttled_reqs[0]); - qemu_co_enter_next(&blkp->throttled_reqs[1]); + throttle_group_restart_blk(blk); } =20 /* Get the throttle configuration from a particular group. Similar to @@ -408,7 +424,6 @@ static void timer_cb(BlockBackend *blk, bool is_write) BlockBackendPublic *blkp =3D blk_get_public(blk); ThrottleState *ts =3D blkp->throttle_state; ThrottleGroup *tg =3D container_of(ts, ThrottleGroup, ts); - bool empty_queue; =20 /* The timer has just been fired, so we can update the flag */ qemu_mutex_lock(&tg->lock); @@ -416,17 +431,7 @@ static void timer_cb(BlockBackend *blk, bool is_write) qemu_mutex_unlock(&tg->lock); =20 /* Run the request that was waiting for this timer */ - aio_context_acquire(blk_get_aio_context(blk)); - empty_queue =3D !qemu_co_enter_next(&blkp->throttled_reqs[is_write]); - aio_context_release(blk_get_aio_context(blk)); - - /* If the request queue was empty then we have to take care of - * scheduling the next one */ - if (empty_queue) { - qemu_mutex_lock(&tg->lock); - schedule_next_request(blk, is_write); - qemu_mutex_unlock(&tg->lock); - } + throttle_group_restart_queue(blk, is_write); } =20 static void read_timer_cb(void *opaque) --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 149578542592777.65046880861644; Fri, 26 May 2017 00:57:05 -0700 (PDT) Received: from localhost ([::1]:35369 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA7M-0007FB-Kc for importer@patchew.org; Fri, 26 May 2017 03:57:04 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54232) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3r-0004Rj-LD for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3o-0006DM-SR for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:27 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38258) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3o-0006D6-Iu for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:24 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7C467C056828; Fri, 26 May 2017 07:53:23 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id CD0725C883; Fri, 26 May 2017 07:53:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 7C467C056828 Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 7C467C056828 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:36 +0800 Message-Id: <20170526075246.20265-13-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 26 May 2017 07:53:23 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 12/22] throttle-groups: do not use qemu_co_enter_next X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Prepare for removing this function; always restart throttled requests from coroutine context. This will matter when restarting throttled requests will have to acquire a CoMutex. Reviewed-by: Alberto Garcia Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-9-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/throttle-groups.c | 42 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 37 insertions(+), 5 deletions(-) diff --git a/block/throttle-groups.c b/block/throttle-groups.c index 85169ec..8bf1031 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -260,6 +260,20 @@ static bool throttle_group_schedule_timer(BlockBackend= *blk, bool is_write) return must_wait; } =20 +/* Start the next pending I/O request for a BlockBackend. Return whether + * any request was actually pending. + * + * @blk: the current BlockBackend + * @is_write: the type of operation (read/write) + */ +static bool coroutine_fn throttle_group_co_restart_queue(BlockBackend *blk, + bool is_write) +{ + BlockBackendPublic *blkp =3D blk_get_public(blk); + + return qemu_co_queue_next(&blkp->throttled_reqs[is_write]); +} + /* Look for the next pending I/O request and schedule it. * * This assumes that tg->lock is held. @@ -287,7 +301,7 @@ static void schedule_next_request(BlockBackend *blk, bo= ol is_write) if (!must_wait) { /* Give preference to requests from the current blk */ if (qemu_in_coroutine() && - qemu_co_queue_next(&blkp->throttled_reqs[is_write])) { + throttle_group_co_restart_queue(blk, is_write)) { token =3D blk; } else { ThrottleTimers *tt =3D &blk_get_public(token)->throttle_timers; @@ -340,15 +354,21 @@ void coroutine_fn throttle_group_co_io_limits_interce= pt(BlockBackend *blk, qemu_mutex_unlock(&tg->lock); } =20 -static void throttle_group_restart_queue(BlockBackend *blk, bool is_write) +typedef struct { + BlockBackend *blk; + bool is_write; +} RestartData; + +static void coroutine_fn throttle_group_restart_queue_entry(void *opaque) { + RestartData *data =3D opaque; + BlockBackend *blk =3D data->blk; + bool is_write =3D data->is_write; BlockBackendPublic *blkp =3D blk_get_public(blk); ThrottleGroup *tg =3D container_of(blkp->throttle_state, ThrottleGroup= , ts); bool empty_queue; =20 - aio_context_acquire(blk_get_aio_context(blk)); - empty_queue =3D !qemu_co_enter_next(&blkp->throttled_reqs[is_write]); - aio_context_release(blk_get_aio_context(blk)); + empty_queue =3D !throttle_group_co_restart_queue(blk, is_write); =20 /* If the request queue was empty then we have to take care of * scheduling the next one */ @@ -359,6 +379,18 @@ static void throttle_group_restart_queue(BlockBackend = *blk, bool is_write) } } =20 +static void throttle_group_restart_queue(BlockBackend *blk, bool is_write) +{ + Coroutine *co; + RestartData rd =3D { + .blk =3D blk, + .is_write =3D is_write + }; + + co =3D qemu_coroutine_create(throttle_group_restart_queue_entry, &rd); + aio_co_enter(blk_get_aio_context(blk), co); +} + void throttle_group_restart_blk(BlockBackend *blk) { BlockBackendPublic *blkp =3D blk_get_public(blk); --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785897049233.42209453189002; Fri, 26 May 2017 01:04:57 -0700 (PDT) Received: from localhost ([::1]:35405 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAEx-00089H-Kh for importer@patchew.org; Fri, 26 May 2017 04:04:55 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54249) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA3u-0004Uj-If for qemu-devel@nongnu.org; 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dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 4E8BE80C06 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:37 +0800 Message-Id: <20170526075246.20265-14-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 26 May 2017 07:53:28 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 13/22] throttle-groups: protect throttled requests with a CoMutex X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Another possibility is to use tg->lock, which we're holding anyway in both schedule_next_request and throttle_group_co_io_limits_intercept. This would require open-coding the CoQueue however, so I've chosen this alternative. Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-10-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/block-backend.c | 1 + block/throttle-groups.c | 12 ++++++++++-- include/sysemu/block-backend.h | 7 ++----- 3 files changed, 13 insertions(+), 7 deletions(-) diff --git a/block/block-backend.c b/block/block-backend.c index e50ec03..be2ddf1 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -216,6 +216,7 @@ BlockBackend *blk_new(uint64_t perm, uint64_t shared_pe= rm) blk->shared_perm =3D shared_perm; blk_set_enable_write_cache(blk, true); =20 + qemu_co_mutex_init(&blk->public.throttled_reqs_lock); qemu_co_queue_init(&blk->public.throttled_reqs[0]); qemu_co_queue_init(&blk->public.throttled_reqs[1]); =20 diff --git a/block/throttle-groups.c b/block/throttle-groups.c index 8bf1031..a181cb1 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -270,8 +270,13 @@ static bool coroutine_fn throttle_group_co_restart_que= ue(BlockBackend *blk, bool is_write) { BlockBackendPublic *blkp =3D blk_get_public(blk); + bool ret; =20 - return qemu_co_queue_next(&blkp->throttled_reqs[is_write]); + qemu_co_mutex_lock(&blkp->throttled_reqs_lock); + ret =3D qemu_co_queue_next(&blkp->throttled_reqs[is_write]); + qemu_co_mutex_unlock(&blkp->throttled_reqs_lock); + + return ret; } =20 /* Look for the next pending I/O request and schedule it. @@ -340,7 +345,10 @@ void coroutine_fn throttle_group_co_io_limits_intercep= t(BlockBackend *blk, if (must_wait || blkp->pending_reqs[is_write]) { blkp->pending_reqs[is_write]++; qemu_mutex_unlock(&tg->lock); - qemu_co_queue_wait(&blkp->throttled_reqs[is_write], NULL); + qemu_co_mutex_lock(&blkp->throttled_reqs_lock); + qemu_co_queue_wait(&blkp->throttled_reqs[is_write], + &blkp->throttled_reqs_lock); + qemu_co_mutex_unlock(&blkp->throttled_reqs_lock); qemu_mutex_lock(&tg->lock); blkp->pending_reqs[is_write]--; } diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 24b63d6..999eb23 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -72,11 +72,8 @@ typedef struct BlockDevOps { * fields that must be public. This is in particular for QLIST_ENTRY() and * friends so that BlockBackends can be kept in lists outside block-backen= d.c */ typedef struct BlockBackendPublic { - /* I/O throttling has its own locking, but also some fields are - * protected by the AioContext lock. - */ - - /* Protected by AioContext lock. */ + /* throttled_reqs_lock protects the CoQueues for throttled requests. = */ + CoMutex throttled_reqs_lock; CoQueue throttled_reqs[2]; =20 /* Nonzero if the I/O limits are currently being ignored; generally --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 14957860170581016.3699808030017; Fri, 26 May 2017 01:06:57 -0700 (PDT) Received: from localhost ([::1]:35426 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAGs-0001OG-Ka for importer@patchew.org; Fri, 26 May 2017 04:06:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54273) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA41-0004aM-Jm for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3x-0006OL-K3 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60500) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3x-0006Ns-A1 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:33 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3099F80475; Fri, 26 May 2017 07:53:32 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 070665C883; Fri, 26 May 2017 07:53:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 3099F80475 Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 3099F80475 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:38 +0800 Message-Id: <20170526075246.20265-15-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 26 May 2017 07:53:32 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 14/22] util: add stats64 module X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini This module provides fast paths for 64-bit atomic operations on machines that only have 32-bit atomic access. Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-11-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- include/qemu/stats64.h | 193 +++++++++++++++++++++++++++++++++++++++++++++= ++++ util/Makefile.objs | 1 + util/stats64.c | 136 ++++++++++++++++++++++++++++++++++ 3 files changed, 330 insertions(+) create mode 100644 include/qemu/stats64.h create mode 100644 util/stats64.c diff --git a/include/qemu/stats64.h b/include/qemu/stats64.h new file mode 100644 index 0000000..4a357b3 --- /dev/null +++ b/include/qemu/stats64.h @@ -0,0 +1,193 @@ +/* + * Atomic operations on 64-bit quantities. + * + * Copyright (C) 2017 Red Hat, Inc. + * + * Author: Paolo Bonzini + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#ifndef QEMU_STATS64_H +#define QEMU_STATS64_H 1 + +#include "qemu/atomic.h" + +/* This provides atomic operations on 64-bit type, using a reader-writer + * spinlock on architectures that do not have 64-bit accesses. Even on + * those architectures, it tries hard not to take the lock. + */ + +typedef struct Stat64 { +#ifdef CONFIG_ATOMIC64 + uint64_t value; +#else + uint32_t low, high; + uint32_t lock; +#endif +} Stat64; + +#ifdef CONFIG_ATOMIC64 +static inline void stat64_init(Stat64 *s, uint64_t value) +{ + /* This is not guaranteed to be atomic! */ + *s =3D (Stat64) { value }; +} + +static inline uint64_t stat64_get(const Stat64 *s) +{ + return atomic_read__nocheck(&s->value); +} + +static inline void stat64_add(Stat64 *s, uint64_t value) +{ + atomic_add(&s->value, value); +} + +static inline void stat64_min(Stat64 *s, uint64_t value) +{ + uint64_t orig =3D atomic_read__nocheck(&s->value); + while (orig > value) { + orig =3D atomic_cmpxchg__nocheck(&s->value, orig, value); + } +} + +static inline void stat64_max(Stat64 *s, uint64_t value) +{ + uint64_t orig =3D atomic_read__nocheck(&s->value); + while (orig < value) { + orig =3D atomic_cmpxchg__nocheck(&s->value, orig, value); + } +} +#else +uint64_t stat64_get(const Stat64 *s); +bool stat64_min_slow(Stat64 *s, uint64_t value); +bool stat64_max_slow(Stat64 *s, uint64_t value); +bool stat64_add32_carry(Stat64 *s, uint32_t low, uint32_t high); + +static inline void stat64_init(Stat64 *s, uint64_t value) +{ + /* This is not guaranteed to be atomic! */ + *s =3D (Stat64) { .low =3D value, .high =3D value >> 32, .lock =3D 0 }; +} + +static inline void stat64_add(Stat64 *s, uint64_t value) +{ + uint32_t low, high; + high =3D value >> 32; + low =3D (uint32_t) value; + if (!low) { + if (high) { + atomic_add(&s->high, high); + } + return; + } + + for (;;) { + uint32_t orig =3D s->low; + uint32_t result =3D orig + low; + uint32_t old; + + if (result < low || high) { + /* If the high part is affected, take the lock. */ + if (stat64_add32_carry(s, low, high)) { + return; + } + continue; + } + + /* No carry, try with a 32-bit cmpxchg. The result is independent= of + * the high 32 bits, so it can race just fine with stat64_add32_ca= rry + * and even stat64_get! + */ + old =3D atomic_cmpxchg(&s->low, orig, result); + if (orig =3D=3D old) { + return; + } + } +} + +static inline void stat64_min(Stat64 *s, uint64_t value) +{ + uint32_t low, high; + uint32_t orig_low, orig_high; + + high =3D value >> 32; + low =3D (uint32_t) value; + do { + orig_high =3D atomic_read(&s->high); + if (orig_high < high) { + return; + } + + if (orig_high =3D=3D high) { + /* High 32 bits are equal. Read low after high, otherwise we + * can get a false positive (e.g. 0x1235,0x0000 changes to + * 0x1234,0x8000 and we read it as 0x1234,0x0000). Pairs with + * the write barrier in stat64_min_slow. + */ + smp_rmb(); + orig_low =3D atomic_read(&s->low); + if (orig_low <=3D low) { + return; + } + + /* See if we were lucky and a writer raced against us. The + * barrier is theoretically unnecessary, but if we remove it + * we may miss being lucky. + */ + smp_rmb(); + orig_high =3D atomic_read(&s->high); + if (orig_high < high) { + return; + } + } + + /* If the value changes in any way, we have to take the lock. */ + } while (!stat64_min_slow(s, value)); +} + +static inline void stat64_max(Stat64 *s, uint64_t value) +{ + uint32_t low, high; + uint32_t orig_low, orig_high; + + high =3D value >> 32; + low =3D (uint32_t) value; + do { + orig_high =3D atomic_read(&s->high); + if (orig_high > high) { + return; + } + + if (orig_high =3D=3D high) { + /* High 32 bits are equal. Read low after high, otherwise we + * can get a false positive (e.g. 0x1234,0x8000 changes to + * 0x1235,0x0000 and we read it as 0x1235,0x8000). Pairs with + * the write barrier in stat64_max_slow. + */ + smp_rmb(); + orig_low =3D atomic_read(&s->low); + if (orig_low >=3D low) { + return; + } + + /* See if we were lucky and a writer raced against us. The + * barrier is theoretically unnecessary, but if we remove it + * we may miss being lucky. + */ + smp_rmb(); + orig_high =3D atomic_read(&s->high); + if (orig_high > high) { + return; + } + } + + /* If the value changes in any way, we have to take the lock. */ + } while (!stat64_max_slow(s, value)); +} + +#endif + +#endif diff --git a/util/Makefile.objs b/util/Makefile.objs index c6205eb..8a333d3 100644 --- a/util/Makefile.objs +++ b/util/Makefile.objs @@ -42,4 +42,5 @@ util-obj-y +=3D log.o util-obj-y +=3D qdist.o util-obj-y +=3D qht.o util-obj-y +=3D range.o +util-obj-y +=3D stats64.o util-obj-y +=3D systemd.o diff --git a/util/stats64.c b/util/stats64.c new file mode 100644 index 0000000..ac236e38 --- /dev/null +++ b/util/stats64.c @@ -0,0 +1,136 @@ +/* + * Atomic operations on 64-bit quantities. + * + * Copyright (C) 2017 Red Hat, Inc. + * + * Author: Paolo Bonzini + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/atomic.h" +#include "qemu/stats64.h" + +#ifndef CONFIG_ATOMIC64 +static inline void stat64_rdlock(Stat64 *s) +{ + /* Keep out incoming writers to avoid them starving us. */ + atomic_add(&s->lock, 2); + + /* If there is a concurrent writer, wait for it. */ + while (atomic_read(&s->lock) & 1) { + cpu_relax(); + } +} + +static inline void stat64_rdunlock(Stat64 *s) +{ + atomic_sub(&s->lock, 2); +} + +static inline bool stat64_wrtrylock(Stat64 *s) +{ + return atomic_cmpxchg(&s->lock, 0, 1) =3D=3D 0; +} + +static inline void stat64_wrunlock(Stat64 *s) +{ + atomic_dec(&s->lock); +} + +uint64_t stat64_get(const Stat64 *s) +{ + uint32_t high, low; + + stat64_rdlock((Stat64 *)s); + + /* 64-bit writes always take the lock, so we can read in + * any order. + */ + high =3D atomic_read(&s->high); + low =3D atomic_read(&s->low); + stat64_rdunlock((Stat64 *)s); + + return ((uint64_t)high << 32) | low; +} + +bool stat64_add32_carry(Stat64 *s, uint32_t low, uint32_t high) +{ + uint32_t old; + + if (!stat64_wrtrylock(s)) { + cpu_relax(); + return false; + } + + /* 64-bit reads always take the lock, so they don't care about the + * order of our update. By updating s->low first, we can check + * whether we have to carry into s->high. + */ + old =3D atomic_fetch_add(&s->low, low); + high +=3D (old + low) < old; + atomic_add(&s->high, high); + stat64_wrunlock(s); + return true; +} + +bool stat64_min_slow(Stat64 *s, uint64_t value) +{ + uint32_t high, low; + uint64_t orig; + + if (!stat64_wrtrylock(s)) { + cpu_relax(); + return false; + } + + high =3D atomic_read(&s->high); + low =3D atomic_read(&s->low); + + orig =3D ((uint64_t)high << 32) | low; + if (orig < value) { + /* We have to set low before high, just like stat64_min reads + * high before low. The value may become higher temporarily, but + * stat64_get does not notice (it takes the lock) and the only ill + * effect on stat64_min is that the slow path may be triggered + * unnecessarily. + */ + atomic_set(&s->low, (uint32_t)value); + smp_wmb(); + atomic_set(&s->high, value >> 32); + } + stat64_wrunlock(s); + return true; +} + +bool stat64_max_slow(Stat64 *s, uint64_t value) +{ + uint32_t high, low; + uint64_t orig; + + if (!stat64_wrtrylock(s)) { + cpu_relax(); + return false; + } + + high =3D atomic_read(&s->high); + low =3D atomic_read(&s->low); + + orig =3D ((uint64_t)high << 32) | low; + if (orig > value) { + /* We have to set low before high, just like stat64_max reads + * high before low. The value may become lower temporarily, but + * stat64_get does not notice (it takes the lock) and the only ill + * effect on stat64_max is that the slow path may be triggered + * unnecessarily. + */ + atomic_set(&s->low, (uint32_t)value); + smp_wmb(); + atomic_set(&s->high, value >> 32); + } + stat64_wrunlock(s); + return true; +} +#endif --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 149578572965331.15296609195218; Fri, 26 May 2017 01:02:09 -0700 (PDT) Received: from localhost ([::1]:35394 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEACG-0004Vf-5S for importer@patchew.org; Fri, 26 May 2017 04:02:08 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54272) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA41-0004aJ-JW for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA3z-0006R2-F3 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39872) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA3z-0006Pn-9C for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:35 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2F7DD8051A; Fri, 26 May 2017 07:53:34 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5C1C85C883; Fri, 26 May 2017 07:53:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 2F7DD8051A Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 2F7DD8051A From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:39 +0800 Message-Id: <20170526075246.20265-16-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:53:34 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 15/22] block: use Stat64 for wr_highest_offset X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-12-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/io.c | 4 +--- block/qapi.c | 2 +- include/block/block_int.h | 7 ++++--- 3 files changed, 6 insertions(+), 7 deletions(-) diff --git a/block/io.c b/block/io.c index f34d030..afb8294 100644 --- a/block/io.c +++ b/block/io.c @@ -1418,9 +1418,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChil= d *child, ++bs->write_gen; bdrv_set_dirty(bs, start_sector, end_sector - start_sector); =20 - if (bs->wr_highest_offset < offset + bytes) { - bs->wr_highest_offset =3D offset + bytes; - } + stat64_max(&bs->wr_highest_offset, offset + bytes); =20 if (ret >=3D 0) { bs->total_sectors =3D MAX(bs->total_sectors, end_sector); diff --git a/block/qapi.c b/block/qapi.c index a40922e..14b60ae 100644 --- a/block/qapi.c +++ b/block/qapi.c @@ -441,7 +441,7 @@ static BlockStats *bdrv_query_bds_stats(const BlockDriv= erState *bs, s->node_name =3D g_strdup(bdrv_get_node_name(bs)); } =20 - s->stats->wr_highest_offset =3D bs->wr_highest_offset; + s->stats->wr_highest_offset =3D stat64_get(&bs->wr_highest_offset); =20 if (bs->file) { s->has_parent =3D true; diff --git a/include/block/block_int.h b/include/block/block_int.h index d54ed75..a23e4bb 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -29,6 +29,7 @@ #include "qemu/option.h" #include "qemu/queue.h" #include "qemu/coroutine.h" +#include "qemu/stats64.h" #include "qemu/timer.h" #include "qapi-types.h" #include "qemu/hbitmap.h" @@ -604,9 +605,6 @@ struct BlockDriverState { /* Callback before write request is processed */ NotifierWithReturnList before_write_notifiers; =20 - /* Offset after the highest byte written to */ - uint64_t wr_highest_offset; - /* threshold limit for writes, in bytes. "High water mark". */ uint64_t write_threshold_offset; NotifierWithReturn write_threshold_notifier; @@ -619,6 +617,9 @@ struct BlockDriverState { =20 QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps; =20 + /* Offset after the highest byte written to */ + Stat64 wr_highest_offset; + /* If true, copy read backing sectors into image. Can be >1 if more * than one client has requested copy-on-read. Accessed with atomic * ops. --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 149578556994344.70820317419884; Fri, 26 May 2017 00:59:29 -0700 (PDT) Received: from localhost ([::1]:35377 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA9g-0002H5-Jo for importer@patchew.org; Fri, 26 May 2017 03:59:28 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54289) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA43-0004aS-8u for qemu-devel@nongnu.org; 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dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 3267780490 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:40 +0800 Message-Id: <20170526075246.20265-17-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 26 May 2017 07:53:36 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 16/22] block: access write_gen with atomics X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-13-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block.c | 2 +- block/io.c | 6 +++--- include/block/block_int.h | 2 +- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/block.c b/block.c index f6066ef..45a77f5 100644 --- a/block.c +++ b/block.c @@ -3384,7 +3384,7 @@ int bdrv_truncate(BdrvChild *child, int64_t offset, E= rror **errp) ret =3D refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS); bdrv_dirty_bitmap_truncate(bs); bdrv_parent_cb_resize(bs); - ++bs->write_gen; + atomic_inc(&bs->write_gen); } return ret; } diff --git a/block/io.c b/block/io.c index afb8294..8021b5b 100644 --- a/block/io.c +++ b/block/io.c @@ -1415,7 +1415,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChil= d *child, } bdrv_debug_event(bs, BLKDBG_PWRITEV_DONE); =20 - ++bs->write_gen; + atomic_inc(&bs->write_gen); bdrv_set_dirty(bs, start_sector, end_sector - start_sector); =20 stat64_max(&bs->wr_highest_offset, offset + bytes); @@ -2304,7 +2304,7 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs) goto early_exit; } =20 - current_gen =3D bs->write_gen; + current_gen =3D atomic_read(&bs->write_gen); =20 /* Wait until any previous flushes are completed */ while (bs->active_flush_req) { @@ -2529,7 +2529,7 @@ int coroutine_fn bdrv_co_pdiscard(BlockDriverState *b= s, int64_t offset, } ret =3D 0; out: - ++bs->write_gen; + atomic_inc(&bs->write_gen); bdrv_set_dirty(bs, req.offset >> BDRV_SECTOR_BITS, req.bytes >> BDRV_SECTOR_BITS); tracked_request_end(&req); diff --git a/include/block/block_int.h b/include/block/block_int.h index a23e4bb..74d6e62 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -612,7 +612,6 @@ struct BlockDriverState { QLIST_HEAD(, BdrvTrackedRequest) tracked_requests; CoQueue flush_queue; /* Serializing flush queue */ bool active_flush_req; /* Flush request in flight? */ - unsigned int write_gen; /* Current data generation */ unsigned int flushed_gen; /* Flushed write generation */ =20 QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps; @@ -647,6 +646,7 @@ struct BlockDriverState { =20 /* Accessed with atomic ops. */ int quiesce_counter; + unsigned int write_gen; /* Current data generation */ }; =20 struct BlockBackendRootState { --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785890978497.17019652085276; Fri, 26 May 2017 01:04:50 -0700 (PDT) Received: from localhost ([::1]:35403 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAEq-00083G-44 for importer@patchew.org; Fri, 26 May 2017 04:04:48 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54321) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA46-0004ct-3K for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA44-0006XT-TO for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39824) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA44-0006X5-KX for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:40 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 82B883D944; Fri, 26 May 2017 07:53:39 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id AFDE45C883; Fri, 26 May 2017 07:53:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 82B883D944 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 82B883D944 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:41 +0800 Message-Id: <20170526075246.20265-18-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 26 May 2017 07:53:39 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 17/22] block: protect tracked_requests and flush_queue with reqs_lock X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-14-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block.c | 1 + block/io.c | 16 ++++++++++++++-- include/block/block_int.h | 14 +++++++++----- 3 files changed, 24 insertions(+), 7 deletions(-) diff --git a/block.c b/block.c index 45a77f5..d297188 100644 --- a/block.c +++ b/block.c @@ -280,6 +280,7 @@ BlockDriverState *bdrv_new(void) QLIST_INIT(&bs->op_blockers[i]); } notifier_with_return_list_init(&bs->before_write_notifiers); + qemu_co_mutex_init(&bs->reqs_lock); bs->refcnt =3D 1; bs->aio_context =3D qemu_get_aio_context(); =20 diff --git a/block/io.c b/block/io.c index 8021b5b..caca63a 100644 --- a/block/io.c +++ b/block/io.c @@ -391,8 +391,10 @@ static void tracked_request_end(BdrvTrackedRequest *re= q) atomic_dec(&req->bs->serialising_in_flight); } =20 + qemu_co_mutex_lock(&req->bs->reqs_lock); QLIST_REMOVE(req, list); qemu_co_queue_restart_all(&req->wait_queue); + qemu_co_mutex_unlock(&req->bs->reqs_lock); } =20 /** @@ -417,7 +419,9 @@ static void tracked_request_begin(BdrvTrackedRequest *r= eq, =20 qemu_co_queue_init(&req->wait_queue); =20 + qemu_co_mutex_lock(&bs->reqs_lock); QLIST_INSERT_HEAD(&bs->tracked_requests, req, list); + qemu_co_mutex_unlock(&bs->reqs_lock); } =20 static void mark_request_serialising(BdrvTrackedRequest *req, uint64_t ali= gn) @@ -539,6 +543,7 @@ static bool coroutine_fn wait_serialising_requests(Bdrv= TrackedRequest *self) =20 do { retry =3D false; + qemu_co_mutex_lock(&bs->reqs_lock); QLIST_FOREACH(req, &bs->tracked_requests, list) { if (req =3D=3D self || (!req->serialising && !self->serialisin= g)) { continue; @@ -557,7 +562,7 @@ static bool coroutine_fn wait_serialising_requests(Bdrv= TrackedRequest *self) * (instead of producing a deadlock in the former case). */ if (!req->waiting_for) { self->waiting_for =3D req; - qemu_co_queue_wait(&req->wait_queue, NULL); + qemu_co_queue_wait(&req->wait_queue, &bs->reqs_lock); self->waiting_for =3D NULL; retry =3D true; waited =3D true; @@ -565,6 +570,7 @@ static bool coroutine_fn wait_serialising_requests(Bdrv= TrackedRequest *self) } } } + qemu_co_mutex_unlock(&bs->reqs_lock); } while (retry); =20 return waited; @@ -2304,14 +2310,17 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs) goto early_exit; } =20 + qemu_co_mutex_lock(&bs->reqs_lock); current_gen =3D atomic_read(&bs->write_gen); =20 /* Wait until any previous flushes are completed */ while (bs->active_flush_req) { - qemu_co_queue_wait(&bs->flush_queue, NULL); + qemu_co_queue_wait(&bs->flush_queue, &bs->reqs_lock); } =20 + /* Flushes reach this point in nondecreasing current_gen order. */ bs->active_flush_req =3D true; + qemu_co_mutex_unlock(&bs->reqs_lock); =20 /* Write back all layers by calling one driver function */ if (bs->drv->bdrv_co_flush) { @@ -2383,9 +2392,12 @@ out: if (ret =3D=3D 0) { bs->flushed_gen =3D current_gen; } + + qemu_co_mutex_lock(&bs->reqs_lock); bs->active_flush_req =3D false; /* Return value is ignored - it's ok if wait queue is empty */ qemu_co_queue_next(&bs->flush_queue); + qemu_co_mutex_unlock(&bs->reqs_lock); =20 early_exit: bdrv_dec_in_flight(bs); diff --git a/include/block/block_int.h b/include/block/block_int.h index 74d6e62..4b2c594 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -609,11 +609,6 @@ struct BlockDriverState { uint64_t write_threshold_offset; NotifierWithReturn write_threshold_notifier; =20 - QLIST_HEAD(, BdrvTrackedRequest) tracked_requests; - CoQueue flush_queue; /* Serializing flush queue */ - bool active_flush_req; /* Flush request in flight? */ - unsigned int flushed_gen; /* Flushed write generation */ - QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps; =20 /* Offset after the highest byte written to */ @@ -647,6 +642,15 @@ struct BlockDriverState { /* Accessed with atomic ops. */ int quiesce_counter; unsigned int write_gen; /* Current data generation */ + + /* Protected by reqs_lock. */ + CoMutex reqs_lock; + QLIST_HEAD(, BdrvTrackedRequest) tracked_requests; + CoQueue flush_queue; /* Serializing flush queue */ + bool active_flush_req; /* Flush request in flight? */ + + /* Only read/written by whoever has set active_flush_req to true. */ + unsigned int flushed_gen; /* Flushed write generation */ }; =20 struct BlockBackendRootState { --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 149578589229241.70066879595811; Fri, 26 May 2017 01:04:52 -0700 (PDT) Received: from localhost ([::1]:35404 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAEs-00084d-T8 for importer@patchew.org; Fri, 26 May 2017 04:04:50 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54397) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA4C-0004j9-Eo for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA48-0006Yu-EI for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38686) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA48-0006YY-4G for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:44 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0B50CC056782; Fri, 26 May 2017 07:53:43 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 168225C883; Fri, 26 May 2017 07:53:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 0B50CC056782 Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 0B50CC056782 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:42 +0800 Message-Id: <20170526075246.20265-19-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 26 May 2017 07:53:43 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 18/22] block: introduce dirty_bitmap_mutex X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini It protects only the list of dirty bitmaps; in the next patch we will also protect their content. Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-15-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/dirty-bitmap.c | 44 +++++++++++++++++++++++++++++++++++++++++++- block/mirror.c | 3 ++- blockdev.c | 44 +++++++------------------------------------- include/block/block_int.h | 5 +++++ migration/block.c | 6 ------ 5 files changed, 57 insertions(+), 45 deletions(-) diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 519737c..fa78109 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -52,6 +52,17 @@ struct BdrvDirtyBitmapIter { BdrvDirtyBitmap *bitmap; }; =20 +static inline void bdrv_dirty_bitmaps_lock(BlockDriverState *bs) +{ + qemu_mutex_lock(&bs->dirty_bitmap_mutex); +} + +static inline void bdrv_dirty_bitmaps_unlock(BlockDriverState *bs) +{ + qemu_mutex_unlock(&bs->dirty_bitmap_mutex); +} + +/* Called with BQL or dirty_bitmap lock taken. */ BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *= name) { BdrvDirtyBitmap *bm; @@ -65,6 +76,7 @@ BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState = *bs, const char *name) return NULL; } =20 +/* Called with BQL taken. */ void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap) { assert(!bdrv_dirty_bitmap_frozen(bitmap)); @@ -72,6 +84,7 @@ void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap) bitmap->name =3D NULL; } =20 +/* Called with BQL taken. */ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, uint32_t granularity, const char *name, @@ -100,7 +113,9 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverSt= ate *bs, bitmap->size =3D bitmap_size; bitmap->name =3D g_strdup(name); bitmap->disabled =3D false; + bdrv_dirty_bitmaps_lock(bs); QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list); + bdrv_dirty_bitmaps_unlock(bs); return bitmap; } =20 @@ -164,16 +179,19 @@ const char *bdrv_dirty_bitmap_name(const BdrvDirtyBit= map *bitmap) return bitmap->name; } =20 +/* Called with BQL taken. */ bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap) { return bitmap->successor; } =20 +/* Called with BQL taken. */ bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap) { return !(bitmap->disabled || bitmap->successor); } =20 +/* Called with BQL taken. */ DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap) { if (bdrv_dirty_bitmap_frozen(bitmap)) { @@ -188,6 +206,7 @@ DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBit= map *bitmap) /** * Create a successor bitmap destined to replace this bitmap after an oper= ation. * Requires that the bitmap is not frozen and has no successor. + * Called with BQL taken. */ int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, Error **er= rp) @@ -220,6 +239,7 @@ int bdrv_dirty_bitmap_create_successor(BlockDriverState= *bs, /** * For a bitmap with a successor, yield our name to the successor, * delete the old bitmap, and return a handle to the new bitmap. + * Called with BQL taken. */ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, @@ -247,6 +267,7 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriver= State *bs, * In cases of failure where we can no longer safely delete the parent, * we may wish to re-join the parent and child/successor. * The merged parent will be un-frozen, but not explicitly re-enabled. + * Called with BQL taken. */ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *parent, @@ -271,25 +292,30 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDrive= rState *bs, =20 /** * Truncates _all_ bitmaps attached to a BDS. + * Called with BQL taken. */ void bdrv_dirty_bitmap_truncate(BlockDriverState *bs) { BdrvDirtyBitmap *bitmap; uint64_t size =3D bdrv_nb_sectors(bs); =20 + bdrv_dirty_bitmaps_lock(bs); QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) { assert(!bdrv_dirty_bitmap_frozen(bitmap)); assert(!bitmap->active_iterators); hbitmap_truncate(bitmap->bitmap, size); bitmap->size =3D size; } + bdrv_dirty_bitmaps_unlock(bs); } =20 +/* Called with BQL taken. */ static void bdrv_do_release_matching_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, bool only_named) { BdrvDirtyBitmap *bm, *next; + bdrv_dirty_bitmaps_lock(bs); QLIST_FOREACH_SAFE(bm, &bs->dirty_bitmaps, list, next) { if ((!bitmap || bm =3D=3D bitmap) && (!only_named || bm->name)) { assert(!bm->active_iterators); @@ -301,15 +327,19 @@ static void bdrv_do_release_matching_dirty_bitmap(Blo= ckDriverState *bs, g_free(bm); =20 if (bitmap) { - return; + goto out; } } } if (bitmap) { abort(); } + +out: + bdrv_dirty_bitmaps_unlock(bs); } =20 +/* Called with BQL taken. */ void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitm= ap) { bdrv_do_release_matching_dirty_bitmap(bs, bitmap, false); @@ -318,18 +348,21 @@ void bdrv_release_dirty_bitmap(BlockDriverState *bs, = BdrvDirtyBitmap *bitmap) /** * Release all named dirty bitmaps attached to a BDS (for use in bdrv_clos= e()). * There must not be any frozen bitmaps attached. + * Called with BQL taken. */ void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs) { bdrv_do_release_matching_dirty_bitmap(bs, NULL, true); } =20 +/* Called with BQL taken. */ void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap) { assert(!bdrv_dirty_bitmap_frozen(bitmap)); bitmap->disabled =3D true; } =20 +/* Called with BQL taken. */ void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap) { assert(!bdrv_dirty_bitmap_frozen(bitmap)); @@ -342,6 +375,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDrive= rState *bs) BlockDirtyInfoList *list =3D NULL; BlockDirtyInfoList **plist =3D &list; =20 + bdrv_dirty_bitmaps_lock(bs); QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { BlockDirtyInfo *info =3D g_new0(BlockDirtyInfo, 1); BlockDirtyInfoList *entry =3D g_new0(BlockDirtyInfoList, 1); @@ -354,6 +388,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDrive= rState *bs) *plist =3D entry; plist =3D &entry->next; } + bdrv_dirty_bitmaps_unlock(bs); =20 return list; } @@ -508,12 +543,19 @@ void bdrv_set_dirty(BlockDriverState *bs, int64_t cur= _sector, int64_t nr_sectors) { BdrvDirtyBitmap *bitmap; + + if (QLIST_EMPTY(&bs->dirty_bitmaps)) { + return; + } + + bdrv_dirty_bitmaps_lock(bs); QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) { if (!bdrv_dirty_bitmap_enabled(bitmap)) { continue; } hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors); } + bdrv_dirty_bitmaps_unlock(bs); } =20 /** diff --git a/block/mirror.c b/block/mirror.c index e86f8f8..4a8874e 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -506,6 +506,8 @@ static void mirror_exit(BlockJob *job, void *opaque) BlockDriverState *mirror_top_bs =3D s->mirror_top_bs; Error *local_err =3D NULL; =20 + bdrv_release_dirty_bitmap(src, s->dirty_bitmap); + /* Make sure that the source BDS doesn't go away before we called * block_job_completed(). */ bdrv_ref(src); @@ -899,7 +901,6 @@ immediate_exit: g_free(s->cow_bitmap); g_free(s->in_flight_bitmap); bdrv_dirty_iter_free(s->dbi); - bdrv_release_dirty_bitmap(bs, s->dirty_bitmap); =20 data =3D g_malloc(sizeof(*data)); data->ret =3D ret; diff --git a/blockdev.c b/blockdev.c index a2fa9f7..8b1874b 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1362,12 +1362,10 @@ out_aio_context: static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node, const char *name, BlockDriverState **pbs, - AioContext **paio, Error **errp) { BlockDriverState *bs; BdrvDirtyBitmap *bitmap; - AioContext *aio_context; =20 if (!node) { error_setg(errp, "Node cannot be NULL"); @@ -1383,29 +1381,17 @@ static BdrvDirtyBitmap *block_dirty_bitmap_lookup(c= onst char *node, return NULL; } =20 - aio_context =3D bdrv_get_aio_context(bs); - aio_context_acquire(aio_context); - bitmap =3D bdrv_find_dirty_bitmap(bs, name); if (!bitmap) { error_setg(errp, "Dirty bitmap '%s' not found", name); - goto fail; + return NULL; } =20 if (pbs) { *pbs =3D bs; } - if (paio) { - *paio =3D aio_context; - } else { - aio_context_release(aio_context); - } =20 return bitmap; - - fail: - aio_context_release(aio_context); - return NULL; } =20 /* New and old BlockDriverState structs for atomic group operations */ @@ -2021,7 +2007,6 @@ static void block_dirty_bitmap_clear_prepare(BlkActio= nState *common, state->bitmap =3D block_dirty_bitmap_lookup(action->node, action->name, &state->bs, - &state->aio_context, errp); if (!state->bitmap) { return; @@ -2729,7 +2714,6 @@ void qmp_block_dirty_bitmap_add(const char *node, con= st char *name, bool has_granularity, uint32_t granularity, Error **errp) { - AioContext *aio_context; BlockDriverState *bs; =20 if (!name || name[0] =3D=3D '\0') { @@ -2742,14 +2726,11 @@ void qmp_block_dirty_bitmap_add(const char *node, c= onst char *name, return; } =20 - aio_context =3D bdrv_get_aio_context(bs); - aio_context_acquire(aio_context); - if (has_granularity) { if (granularity < 512 || !is_power_of_2(granularity)) { error_setg(errp, "Granularity must be power of 2 " "and at least 512"); - goto out; + return; } } else { /* Default to cluster size, if available: */ @@ -2757,19 +2738,15 @@ void qmp_block_dirty_bitmap_add(const char *node, c= onst char *name, } =20 bdrv_create_dirty_bitmap(bs, granularity, name, errp); - - out: - aio_context_release(aio_context); } =20 void qmp_block_dirty_bitmap_remove(const char *node, const char *name, Error **errp) { - AioContext *aio_context; BlockDriverState *bs; BdrvDirtyBitmap *bitmap; =20 - bitmap =3D block_dirty_bitmap_lookup(node, name, &bs, &aio_context, er= rp); + bitmap =3D block_dirty_bitmap_lookup(node, name, &bs, errp); if (!bitmap || !bs) { return; } @@ -2778,13 +2755,10 @@ void qmp_block_dirty_bitmap_remove(const char *node= , const char *name, error_setg(errp, "Bitmap '%s' is currently frozen and cannot be removed", name); - goto out; + return; } bdrv_dirty_bitmap_make_anon(bitmap); bdrv_release_dirty_bitmap(bs, bitmap); - - out: - aio_context_release(aio_context); } =20 /** @@ -2794,11 +2768,10 @@ void qmp_block_dirty_bitmap_remove(const char *node= , const char *name, void qmp_block_dirty_bitmap_clear(const char *node, const char *name, Error **errp) { - AioContext *aio_context; BdrvDirtyBitmap *bitmap; BlockDriverState *bs; =20 - bitmap =3D block_dirty_bitmap_lookup(node, name, &bs, &aio_context, er= rp); + bitmap =3D block_dirty_bitmap_lookup(node, name, &bs, errp); if (!bitmap || !bs) { return; } @@ -2807,18 +2780,15 @@ void qmp_block_dirty_bitmap_clear(const char *node,= const char *name, error_setg(errp, "Bitmap '%s' is currently frozen and cannot be modified= ", name); - goto out; + return; } else if (!bdrv_dirty_bitmap_enabled(bitmap)) { error_setg(errp, "Bitmap '%s' is currently disabled and cannot be cleare= d", name); - goto out; + return; } =20 bdrv_clear_dirty_bitmap(bitmap, NULL); - - out: - aio_context_release(aio_context); } =20 void hmp_drive_del(Monitor *mon, const QDict *qdict) diff --git a/include/block/block_int.h b/include/block/block_int.h index 4b2c594..5b10f6b 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -609,6 +609,11 @@ struct BlockDriverState { uint64_t write_threshold_offset; NotifierWithReturn write_threshold_notifier; =20 + /* Writing to the list requires the BQL _and_ the dirty_bitmap_mutex. + * Reading from the list can be done with either the BQL or the + * dirty_bitmap_mutex. Modifying a bitmap requires the AioContext + * lock. */ + QemuMutex dirty_bitmap_mutex; QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps; =20 /* Offset after the highest byte written to */ diff --git a/migration/block.c b/migration/block.c index 13f90d3..9e9f031 100644 --- a/migration/block.c +++ b/migration/block.c @@ -345,10 +345,8 @@ static int set_dirty_tracking(void) int ret; =20 QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { - aio_context_acquire(blk_get_aio_context(bmds->blk)); bmds->dirty_bitmap =3D bdrv_create_dirty_bitmap(blk_bs(bmds->blk), BLOCK_SIZE, NULL, NU= LL); - aio_context_release(blk_get_aio_context(bmds->blk)); if (!bmds->dirty_bitmap) { ret =3D -errno; goto fail; @@ -359,9 +357,7 @@ static int set_dirty_tracking(void) fail: QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { if (bmds->dirty_bitmap) { - aio_context_acquire(blk_get_aio_context(bmds->blk)); bdrv_release_dirty_bitmap(blk_bs(bmds->blk), bmds->dirty_bitma= p); - aio_context_release(blk_get_aio_context(bmds->blk)); } } return ret; @@ -374,9 +370,7 @@ static void unset_dirty_tracking(void) BlkMigDevState *bmds; =20 QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { - aio_context_acquire(blk_get_aio_context(bmds->blk)); bdrv_release_dirty_bitmap(blk_bs(bmds->blk), bmds->dirty_bitmap); - aio_context_release(blk_get_aio_context(bmds->blk)); } } =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785783919320.4837346844903; Fri, 26 May 2017 01:03:03 -0700 (PDT) Received: from localhost ([::1]:35397 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAD8-0005aO-ES for importer@patchew.org; Fri, 26 May 2017 04:03:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54400) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA4C-0004jE-HI for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA4B-0006aP-N4 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33056) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA4B-0006a1-HI for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:47 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 70080448D79; Fri, 26 May 2017 07:53:46 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3809F5C883; Fri, 26 May 2017 07:53:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 70080448D79 Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 70080448D79 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:43 +0800 Message-Id: <20170526075246.20265-20-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 26 May 2017 07:53:46 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 19/22] migration/block: reset dirty bitmap before reading X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Any data that is returned by read may be stale already, the bitmap has to be cleared before issuing the read. Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-16-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- migration/block.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/migration/block.c b/migration/block.c index 9e9f031..8fe484e 100644 --- a/migration/block.c +++ b/migration/block.c @@ -536,6 +536,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDev= State *bmds, } else { nr_sectors =3D BDRV_SECTORS_PER_DIRTY_CHUNK; } + bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors= ); + blk =3D g_new(BlkMigBlock, 1); blk->buf =3D g_malloc(BLOCK_SIZE); blk->bmds =3D bmds; @@ -568,7 +570,6 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDev= State *bmds, g_free(blk); } =20 - bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors= ); sector +=3D nr_sectors; bmds->cur_dirty =3D sector; =20 --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495785941204354.88239233240677; Fri, 26 May 2017 01:05:41 -0700 (PDT) Received: from localhost ([::1]:35411 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAFf-0000OB-Rx for importer@patchew.org; Fri, 26 May 2017 04:05:39 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54436) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA4F-0004mR-J7 for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA4D-0006bJ-Vp for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40122) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA4D-0006b0-Lz for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:49 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 932F880511; Fri, 26 May 2017 07:53:48 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 04CD75C883; Fri, 26 May 2017 07:53:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 932F880511 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 932F880511 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:44 +0800 Message-Id: <20170526075246.20265-21-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 26 May 2017 07:53:48 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 20/22] block: protect modification of dirty bitmaps with a mutex X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-17-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/dirty-bitmap.c | 70 ++++++++++++++++++++++++++++++++++++++--= ---- block/mirror.c | 11 +++++-- include/block/block_int.h | 4 +-- include/block/dirty-bitmap.h | 25 +++++++++++----- migration/block.c | 10 ++++--- 5 files changed, 95 insertions(+), 25 deletions(-) diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index fa78109..a04c6e4 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -37,6 +37,7 @@ * or enabled. A frozen bitmap can only abdicate() or reclaim(). */ struct BdrvDirtyBitmap { + QemuMutex *mutex; HBitmap *bitmap; /* Dirty sector bitmap implementation */ HBitmap *meta; /* Meta dirty bitmap */ BdrvDirtyBitmap *successor; /* Anonymous child; implies frozen status = */ @@ -62,6 +63,16 @@ static inline void bdrv_dirty_bitmaps_unlock(BlockDriver= State *bs) qemu_mutex_unlock(&bs->dirty_bitmap_mutex); } =20 +void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap) +{ + qemu_mutex_lock(bitmap->mutex); +} + +void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap) +{ + qemu_mutex_unlock(bitmap->mutex); +} + /* Called with BQL or dirty_bitmap lock taken. */ BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *= name) { @@ -109,6 +120,7 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverSt= ate *bs, return NULL; } bitmap =3D g_new0(BdrvDirtyBitmap, 1); + bitmap->mutex =3D &bs->dirty_bitmap_mutex; bitmap->bitmap =3D hbitmap_alloc(bitmap_size, ctz32(sector_granularity= )); bitmap->size =3D bitmap_size; bitmap->name =3D g_strdup(name); @@ -134,20 +146,24 @@ void bdrv_create_meta_dirty_bitmap(BdrvDirtyBitmap *b= itmap, int chunk_size) { assert(!bitmap->meta); + qemu_mutex_lock(bitmap->mutex); bitmap->meta =3D hbitmap_create_meta(bitmap->bitmap, chunk_size * BITS_PER_BYTE); + qemu_mutex_unlock(bitmap->mutex); } =20 void bdrv_release_meta_dirty_bitmap(BdrvDirtyBitmap *bitmap) { assert(bitmap->meta); + qemu_mutex_lock(bitmap->mutex); hbitmap_free_meta(bitmap->bitmap); bitmap->meta =3D NULL; + qemu_mutex_unlock(bitmap->mutex); } =20 -int bdrv_dirty_bitmap_get_meta(BlockDriverState *bs, - BdrvDirtyBitmap *bitmap, int64_t sector, - int nb_sectors) +int bdrv_dirty_bitmap_get_meta_locked(BlockDriverState *bs, + BdrvDirtyBitmap *bitmap, int64_t sec= tor, + int nb_sectors) { uint64_t i; int sectors_per_bit =3D 1 << hbitmap_granularity(bitmap->meta); @@ -162,11 +178,26 @@ int bdrv_dirty_bitmap_get_meta(BlockDriverState *bs, return false; } =20 +int bdrv_dirty_bitmap_get_meta(BlockDriverState *bs, + BdrvDirtyBitmap *bitmap, int64_t sector, + int nb_sectors) +{ + bool dirty; + + qemu_mutex_lock(bitmap->mutex); + dirty =3D bdrv_dirty_bitmap_get_meta_locked(bs, bitmap, sector, nb_sec= tors); + qemu_mutex_unlock(bitmap->mutex); + + return dirty; +} + void bdrv_dirty_bitmap_reset_meta(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector, int nb_sectors) { + qemu_mutex_lock(bitmap->mutex); hbitmap_reset(bitmap->meta, sector, nb_sectors); + qemu_mutex_unlock(bitmap->mutex); } =20 int64_t bdrv_dirty_bitmap_size(const BdrvDirtyBitmap *bitmap) @@ -393,8 +424,9 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDrive= rState *bs) return list; } =20 -int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, - int64_t sector) +/* Called within bdrv_dirty_bitmap_lock..unlock */ +int bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, + int64_t sector) { if (bitmap) { return hbitmap_get(bitmap->bitmap, sector); @@ -467,23 +499,42 @@ int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *ite= r) return hbitmap_iter_next(&iter->hbi); } =20 -void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, - int64_t cur_sector, int64_t nr_sectors) +/* Called within bdrv_dirty_bitmap_lock..unlock */ +void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, + int64_t cur_sector, int64_t nr_sectors) { assert(bdrv_dirty_bitmap_enabled(bitmap)); hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors); } =20 -void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, - int64_t cur_sector, int64_t nr_sectors) +void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, + int64_t cur_sector, int64_t nr_sectors) +{ + bdrv_dirty_bitmap_lock(bitmap); + bdrv_set_dirty_bitmap_locked(bitmap, cur_sector, nr_sectors); + bdrv_dirty_bitmap_unlock(bitmap); +} + +/* Called within bdrv_dirty_bitmap_lock..unlock */ +void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, + int64_t cur_sector, int64_t nr_sectors) { assert(bdrv_dirty_bitmap_enabled(bitmap)); hbitmap_reset(bitmap->bitmap, cur_sector, nr_sectors); } =20 +void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, + int64_t cur_sector, int64_t nr_sectors) +{ + bdrv_dirty_bitmap_lock(bitmap); + bdrv_reset_dirty_bitmap_locked(bitmap, cur_sector, nr_sectors); + bdrv_dirty_bitmap_unlock(bitmap); +} + void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out) { assert(bdrv_dirty_bitmap_enabled(bitmap)); + bdrv_dirty_bitmap_lock(bitmap); if (!out) { hbitmap_reset_all(bitmap->bitmap); } else { @@ -492,6 +543,7 @@ void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, H= Bitmap **out) hbitmap_granularity(backup)); *out =3D backup; } + bdrv_dirty_bitmap_unlock(bitmap); } =20 void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in) diff --git a/block/mirror.c b/block/mirror.c index 4a8874e..7a9fd54 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -342,6 +342,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlo= ckJob *s) int max_io_sectors =3D MAX((s->buf_size >> BDRV_SECTOR_BITS) / MAX_IN_= FLIGHT, MAX_IO_SECTORS); =20 + bdrv_dirty_bitmap_lock(s->dirty_bitmap); sector_num =3D bdrv_dirty_iter_next(s->dbi); if (sector_num < 0) { bdrv_set_dirty_iter(s->dbi, 0); @@ -349,6 +350,7 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlo= ckJob *s) trace_mirror_restart_iter(s, bdrv_get_dirty_count(s->dirty_bitmap)= ); assert(sector_num >=3D 0); } + bdrv_dirty_bitmap_unlock(s->dirty_bitmap); =20 first_chunk =3D sector_num / sectors_per_chunk; while (test_bit(first_chunk, s->in_flight_bitmap)) { @@ -360,12 +362,13 @@ static uint64_t coroutine_fn mirror_iteration(MirrorB= lockJob *s) =20 /* Find the number of consective dirty chunks following the first dirty * one, and wait for in flight requests in them. */ + bdrv_dirty_bitmap_lock(s->dirty_bitmap); while (nb_chunks * sectors_per_chunk < (s->buf_size >> BDRV_SECTOR_BIT= S)) { int64_t next_dirty; int64_t next_sector =3D sector_num + nb_chunks * sectors_per_chunk; int64_t next_chunk =3D next_sector / sectors_per_chunk; if (next_sector >=3D end || - !bdrv_get_dirty(source, s->dirty_bitmap, next_sector)) { + !bdrv_get_dirty_locked(source, s->dirty_bitmap, next_sector)) { break; } if (test_bit(next_chunk, s->in_flight_bitmap)) { @@ -386,8 +389,10 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBl= ockJob *s) * calling bdrv_get_block_status_above could yield - if some blocks are * marked dirty in this window, we need to know. */ - bdrv_reset_dirty_bitmap(s->dirty_bitmap, sector_num, - nb_chunks * sectors_per_chunk); + bdrv_reset_dirty_bitmap_locked(s->dirty_bitmap, sector_num, + nb_chunks * sectors_per_chunk); + bdrv_dirty_bitmap_unlock(s->dirty_bitmap); + bitmap_set(s->in_flight_bitmap, sector_num / sectors_per_chunk, nb_chu= nks); while (nb_chunks > 0 && sector_num < end) { int64_t ret; diff --git a/include/block/block_int.h b/include/block/block_int.h index 5b10f6b..a60707f 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -611,8 +611,8 @@ struct BlockDriverState { =20 /* Writing to the list requires the BQL _and_ the dirty_bitmap_mutex. * Reading from the list can be done with either the BQL or the - * dirty_bitmap_mutex. Modifying a bitmap requires the AioContext - * lock. */ + * dirty_bitmap_mutex. Modifying a bitmap only requires + * dirty_bitmap_mutex. */ QemuMutex dirty_bitmap_mutex; QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps; =20 diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 9dea14b..ad6558a 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -36,8 +36,6 @@ bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap); const char *bdrv_dirty_bitmap_name(const BdrvDirtyBitmap *bitmap); int64_t bdrv_dirty_bitmap_size(const BdrvDirtyBitmap *bitmap); DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap); -int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, - int64_t sector); void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap, int64_t cur_sector, int64_t nr_sectors); void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, @@ -45,6 +43,9 @@ void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap, int bdrv_dirty_bitmap_get_meta(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector, int nb_sectors); +int bdrv_dirty_bitmap_get_meta_locked(BlockDriverState *bs, + BdrvDirtyBitmap *bitmap, int64_t sec= tor, + int nb_sectors); void bdrv_dirty_bitmap_reset_meta(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector, int nb_sectors); @@ -52,11 +53,6 @@ BdrvDirtyBitmapIter *bdrv_dirty_meta_iter_new(BdrvDirtyB= itmap *bitmap); BdrvDirtyBitmapIter *bdrv_dirty_iter_new(BdrvDirtyBitmap *bitmap, uint64_t first_sector); void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter); -int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter); -void bdrv_set_dirty_iter(BdrvDirtyBitmapIter *hbi, int64_t sector_num); -int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap); -int64_t bdrv_get_meta_dirty_count(BdrvDirtyBitmap *bitmap); -void bdrv_dirty_bitmap_truncate(BlockDriverState *bs); =20 uint64_t bdrv_dirty_bitmap_serialization_size(const BdrvDirtyBitmap *bitma= p, uint64_t start, uint64_t cou= nt); @@ -72,4 +68,19 @@ void bdrv_dirty_bitmap_deserialize_zeroes(BdrvDirtyBitma= p *bitmap, bool finish); void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap); =20 +/* Functions that require manual locking. */ +void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap); +void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap); +int bdrv_get_dirty_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, + int64_t sector); +void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, + int64_t cur_sector, int64_t nr_sectors); +void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap, + int64_t cur_sector, int64_t nr_sectors= ); +int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter); +void bdrv_set_dirty_iter(BdrvDirtyBitmapIter *hbi, int64_t sector_num); +int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap); +int64_t bdrv_get_meta_dirty_count(BdrvDirtyBitmap *bitmap); +void bdrv_dirty_bitmap_truncate(BlockDriverState *bs); + #endif diff --git a/migration/block.c b/migration/block.c index 8fe484e..d102c84 100644 --- a/migration/block.c +++ b/migration/block.c @@ -529,14 +529,15 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigD= evState *bmds, } else { blk_mig_unlock(); } - if (bdrv_get_dirty(bs, bmds->dirty_bitmap, sector)) { - + bdrv_dirty_bitmap_lock(bmds->dirty_bitmap); + if (bdrv_get_dirty_locked(bs, bmds->dirty_bitmap, sector)) { if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { nr_sectors =3D total_sectors - sector; } else { nr_sectors =3D BDRV_SECTORS_PER_DIRTY_CHUNK; } - bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors= ); + bdrv_reset_dirty_bitmap_locked(bmds->dirty_bitmap, sector, nr_= sectors); + bdrv_dirty_bitmap_unlock(bmds->dirty_bitmap); =20 blk =3D g_new(BlkMigBlock, 1); blk->buf =3D g_malloc(BLOCK_SIZE); @@ -572,9 +573,10 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDe= vState *bmds, =20 sector +=3D nr_sectors; bmds->cur_dirty =3D sector; - break; } + + bdrv_dirty_bitmap_unlock(bmds->dirty_bitmap); sector +=3D BDRV_SECTORS_PER_DIRTY_CHUNK; bmds->cur_dirty =3D sector; } --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; 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Fri, 26 May 2017 03:53:51 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9E16A7AE9B; Fri, 26 May 2017 07:53:50 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2980E5C3FD; Fri, 26 May 2017 07:53:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 9E16A7AE9B Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 9E16A7AE9B From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:45 +0800 Message-Id: <20170526075246.20265-22-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 26 May 2017 07:53:50 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 21/22] block: introduce block_account_one_io X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini This is the common code to account operations that produced actual I/O. Reviewed-by: Alberto Garcia Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-18-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/accounting.c | 51 ++++++++++++++++++++++----------------------------- 1 file changed, 22 insertions(+), 29 deletions(-) diff --git a/block/accounting.c b/block/accounting.c index 3f457c4..a279e0b 100644 --- a/block/accounting.c +++ b/block/accounting.c @@ -86,7 +86,8 @@ void block_acct_start(BlockAcctStats *stats, BlockAcctCoo= kie *cookie, cookie->type =3D type; } =20 -void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) +static void block_account_one_io(BlockAcctStats *stats, BlockAcctCookie *c= ookie, + bool failed) { BlockAcctTimedStats *s; int64_t time_ns =3D qemu_clock_get_ns(clock_type); @@ -98,31 +99,14 @@ void block_acct_done(BlockAcctStats *stats, BlockAcctCo= okie *cookie) =20 assert(cookie->type < BLOCK_MAX_IOTYPE); =20 - stats->nr_bytes[cookie->type] +=3D cookie->bytes; - stats->nr_ops[cookie->type]++; - stats->total_time_ns[cookie->type] +=3D latency_ns; - stats->last_access_time_ns =3D time_ns; - - QSLIST_FOREACH(s, &stats->intervals, entries) { - timed_average_account(&s->latency[cookie->type], latency_ns); + if (failed) { + stats->failed_ops[cookie->type]++; + } else { + stats->nr_bytes[cookie->type] +=3D cookie->bytes; + stats->nr_ops[cookie->type]++; } -} - -void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie) -{ - assert(cookie->type < BLOCK_MAX_IOTYPE); - - stats->failed_ops[cookie->type]++; - - if (stats->account_failed) { - BlockAcctTimedStats *s; - int64_t time_ns =3D qemu_clock_get_ns(clock_type); - int64_t latency_ns =3D time_ns - cookie->start_time_ns; - - if (qtest_enabled()) { - latency_ns =3D qtest_latency_ns; - } =20 + if (!failed || stats->account_failed) { stats->total_time_ns[cookie->type] +=3D latency_ns; stats->last_access_time_ns =3D time_ns; =20 @@ -132,15 +116,24 @@ void block_acct_failed(BlockAcctStats *stats, BlockAc= ctCookie *cookie) } } =20 +void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) +{ + block_account_one_io(stats, cookie, false); +} + +void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie) +{ + block_account_one_io(stats, cookie, true); +} + void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type) { assert(type < BLOCK_MAX_IOTYPE); =20 - /* block_acct_done() and block_acct_failed() update - * total_time_ns[], but this one does not. The reason is that - * invalid requests are accounted during their submission, - * therefore there's no actual I/O involved. */ - + /* block_account_one_io() updates total_time_ns[], but this one does + * not. The reason is that invalid requests are accounted during their + * submission, therefore there's no actual I/O involved. + */ stats->invalid_ops[type]++; =20 if (stats->account_invalid) { --=20 2.9.4 From nobody Fri May 3 17:06:55 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1495786114725475.16854863354183; Fri, 26 May 2017 01:08:34 -0700 (PDT) Received: from localhost ([::1]:35437 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEAIR-0003yG-61 for importer@patchew.org; Fri, 26 May 2017 04:08:31 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54487) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dEA4M-0004sz-6V for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dEA4I-0006eN-7C for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33200) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dEA4H-0006cm-TK for qemu-devel@nongnu.org; Fri, 26 May 2017 03:53:54 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C44D137EEB; Fri, 26 May 2017 07:53:52 +0000 (UTC) Received: from lemon.redhat.com (ovpn-12-65.pek2.redhat.com [10.72.12.65]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4E6075C3FD; Fri, 26 May 2017 07:53:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com C44D137EEB Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=famz@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com C44D137EEB From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 26 May 2017 15:52:46 +0800 Message-Id: <20170526075246.20265-23-famz@redhat.com> In-Reply-To: <20170526075246.20265-1-famz@redhat.com> References: <20170526075246.20265-1-famz@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Fri, 26 May 2017 07:53:52 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 22/22] block: make accounting thread-safe X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Paolo Bonzini I'm not trying too hard yet. Later, with multiqueue support, this may cause mutex contention or cacheline bouncing. Reviewed-by: Alberto Garcia Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini Message-Id: <20170525163225.29954-19-pbonzini@redhat.com> Signed-off-by: Fam Zheng --- block/accounting.c | 16 ++++++++++++++++ include/block/accounting.h | 8 ++++++-- 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/block/accounting.c b/block/accounting.c index a279e0b..37ed66f 100644 --- a/block/accounting.c +++ b/block/accounting.c @@ -35,6 +35,7 @@ static const int qtest_latency_ns =3D NANOSECONDS_PER_SEC= OND / 1000; void block_acct_init(BlockAcctStats *stats, bool account_invalid, bool account_failed) { + qemu_mutex_init(&stats->lock); stats->account_invalid =3D account_invalid; stats->account_failed =3D account_failed; =20 @@ -49,6 +50,7 @@ void block_acct_cleanup(BlockAcctStats *stats) QSLIST_FOREACH_SAFE(s, &stats->intervals, entries, next) { g_free(s); } + qemu_mutex_destroy(&stats->lock); } =20 void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_leng= th) @@ -58,12 +60,15 @@ void block_acct_add_interval(BlockAcctStats *stats, uns= igned interval_length) =20 s =3D g_new0(BlockAcctTimedStats, 1); s->interval_length =3D interval_length; + s->stats =3D stats; + qemu_mutex_lock(&stats->lock); QSLIST_INSERT_HEAD(&stats->intervals, s, entries); =20 for (i =3D 0; i < BLOCK_MAX_IOTYPE; i++) { timed_average_init(&s->latency[i], clock_type, (uint64_t) interval_length * NANOSECONDS_PER_SE= COND); } + qemu_mutex_unlock(&stats->lock); } =20 BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats, @@ -99,6 +104,8 @@ static void block_account_one_io(BlockAcctStats *stats, = BlockAcctCookie *cookie, =20 assert(cookie->type < BLOCK_MAX_IOTYPE); =20 + qemu_mutex_lock(&stats->lock); + if (failed) { stats->failed_ops[cookie->type]++; } else { @@ -114,6 +121,8 @@ static void block_account_one_io(BlockAcctStats *stats,= BlockAcctCookie *cookie, timed_average_account(&s->latency[cookie->type], latency_ns); } } + + qemu_mutex_unlock(&stats->lock); } =20 void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) @@ -134,18 +143,23 @@ void block_acct_invalid(BlockAcctStats *stats, enum B= lockAcctType type) * not. The reason is that invalid requests are accounted during their * submission, therefore there's no actual I/O involved. */ + qemu_mutex_lock(&stats->lock); stats->invalid_ops[type]++; =20 if (stats->account_invalid) { stats->last_access_time_ns =3D qemu_clock_get_ns(clock_type); } + qemu_mutex_unlock(&stats->lock); } =20 void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type, int num_requests) { assert(type < BLOCK_MAX_IOTYPE); + + qemu_mutex_lock(&stats->lock); stats->merged[type] +=3D num_requests; + qemu_mutex_unlock(&stats->lock); } =20 int64_t block_acct_idle_time_ns(BlockAcctStats *stats) @@ -160,7 +174,9 @@ double block_acct_queue_depth(BlockAcctTimedStats *stat= s, =20 assert(type < BLOCK_MAX_IOTYPE); =20 + qemu_mutex_lock(&stats->stats->lock); sum =3D timed_average_sum(&stats->latency[type], &elapsed); + qemu_mutex_unlock(&stats->stats->lock); =20 return (double) sum / elapsed; } diff --git a/include/block/accounting.h b/include/block/accounting.h index 2089163..2687be7 100644 --- a/include/block/accounting.h +++ b/include/block/accounting.h @@ -26,8 +26,10 @@ #define BLOCK_ACCOUNTING_H =20 #include "qemu/timed-average.h" +#include "qemu/thread.h" =20 typedef struct BlockAcctTimedStats BlockAcctTimedStats; +typedef struct BlockAcctStats BlockAcctStats; =20 enum BlockAcctType { BLOCK_ACCT_READ, @@ -37,12 +39,14 @@ enum BlockAcctType { }; =20 struct BlockAcctTimedStats { + BlockAcctStats *stats; TimedAverage latency[BLOCK_MAX_IOTYPE]; unsigned interval_length; /* in seconds */ QSLIST_ENTRY(BlockAcctTimedStats) entries; }; =20 -typedef struct BlockAcctStats { +struct BlockAcctStats { + QemuMutex lock; uint64_t nr_bytes[BLOCK_MAX_IOTYPE]; uint64_t nr_ops[BLOCK_MAX_IOTYPE]; uint64_t invalid_ops[BLOCK_MAX_IOTYPE]; @@ -53,7 +57,7 @@ typedef struct BlockAcctStats { QSLIST_HEAD(, BlockAcctTimedStats) intervals; bool account_invalid; bool account_failed; -} BlockAcctStats; +}; =20 typedef struct BlockAcctCookie { int64_t bytes; --=20 2.9.4