From nobody Wed Apr 16 03:50:32 2025 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.zohomail.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; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1526492698031122.53844408924203; Wed, 16 May 2018 10:44:58 -0700 (PDT) Received: from localhost ([::1]:58891 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fJ0Tx-0008Sl-6z for importer@patchew.org; Wed, 16 May 2018 13:44:57 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33427) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fJ0Rz-0006yF-BM for qemu-devel@nongnu.org; Wed, 16 May 2018 13:42:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fJ0Rx-0006qU-SJ for qemu-devel@nongnu.org; Wed, 16 May 2018 13:42:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:31645) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fJ0Rs-0006nx-Mx; Wed, 16 May 2018 13:42:48 -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 DEBA1B0CF1; Wed, 16 May 2018 17:42:47 +0000 (UTC) Received: from localhost (ovpn-116-69.phx2.redhat.com [10.3.116.69]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CD5DE6313C; Wed, 16 May 2018 17:42:43 +0000 (UTC) From: Jeff Cody To: qemu-block@nongnu.org Date: Wed, 16 May 2018 13:42:32 -0400 Message-Id: <20180516174234.311-3-jcody@redhat.com> In-Reply-To: <20180516174234.311-1-jcody@redhat.com> References: <20180516174234.311-1-jcody@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]); Wed, 16 May 2018 17:42:47 +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 2/4] blockjob: do not cancel timer in resume 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: Kevin Wolf , peter.maydell@linaro.org, jcody@redhat.com, qemu-devel@nongnu.org, QingFeng Hao , 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: Stefan Hajnoczi Currently the timer is cancelled and the block job is entered by block_job_resume(). This behavior causes drain to run extra blockjob iterations when the job was sleeping due to the ratelimit. This patch leaves the job asleep when block_job_resume() is called. Jobs can still be forcibly woken up using block_job_enter(), which is used to cancel jobs. After this patch drain no longer runs extra blockjob iterations. This is the expected behavior that qemu-iotests 185 used to rely on. We temporarily changed the 185 test output to make it pass for the QEMU 2.12 release but now it's time to address this issue. Cc: QingFeng Hao Signed-off-by: Stefan Hajnoczi Reviewed-by: Eric Blake Reviewed-by: QingFeng Hao Message-id: 20180508135436.30140-3-stefanha@redhat.com Reviewed-by: Jeff Cody Signed-off-by: Jeff Cody --- blockjob.c | 22 +++++++++++++++------- tests/qemu-iotests/185 | 5 +---- tests/qemu-iotests/185.out | 12 +++++------- 3 files changed, 21 insertions(+), 18 deletions(-) diff --git a/blockjob.c b/blockjob.c index 36c5fdeb2f..112672a68b 100644 --- a/blockjob.c +++ b/blockjob.c @@ -209,6 +209,18 @@ static void block_job_txn_del_job(BlockJob *job) } } =20 +/* Assumes the block_job_mutex is held */ +static bool block_job_timer_pending(BlockJob *job) +{ + return timer_pending(&job->sleep_timer); +} + +/* Assumes the block_job_mutex is held */ +static bool block_job_timer_not_pending(BlockJob *job) +{ + return !block_job_timer_pending(job); +} + static void block_job_pause(BlockJob *job) { job->pause_count++; @@ -221,7 +233,9 @@ static void block_job_resume(BlockJob *job) if (job->pause_count) { return; } - block_job_enter(job); + + /* kick only if no timer is pending */ + block_job_enter_cond(job, block_job_timer_not_pending); } =20 void block_job_ref(BlockJob *job) @@ -656,12 +670,6 @@ static void block_job_completed_txn_success(BlockJob *= job) } } =20 -/* Assumes the block_job_mutex is held */ -static bool block_job_timer_pending(BlockJob *job) -{ - return timer_pending(&job->sleep_timer); -} - void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp) { int64_t old_speed =3D job->speed; diff --git a/tests/qemu-iotests/185 b/tests/qemu-iotests/185 index 975404c99d..9a2d317414 100755 --- a/tests/qemu-iotests/185 +++ b/tests/qemu-iotests/185 @@ -101,14 +101,11 @@ echo # command to be received (after receiving the command, the rest runs # synchronously, so jobs can arbitrarily continue or complete). # -# Jobs present while QEMU is terminating iterate once more due to -# bdrv_drain_all(). -# # The buffer size for commit and streaming is 512k (waiting for 8 seconds = after # the first request), for active commit and mirror it's large enough to co= ver # the full 4M, and for backup it's the qcow2 cluster size, which we know is # 64k. As all of these are at least as large as the speed, we are sure tha= t the -# offset advances exactly twice before qemu exits. +# offset advances exactly once before qemu exits. =20 _send_qemu_cmd $h \ "{ 'execute': 'block-commit', diff --git a/tests/qemu-iotests/185.out b/tests/qemu-iotests/185.out index 992162f418..57eaf8d699 100644 --- a/tests/qemu-iotests/185.out +++ b/tests/qemu-iotests/185.out @@ -20,7 +20,7 @@ Formatting 'TEST_DIR/t.qcow2', fmt=3Dqcow2 size=3D6710886= 4 backing_file=3DTEST_DIR/t.q {"return": {}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "SHUTDOWN", "data": {"guest": false}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 67108864, "offse= t": 1048576, "speed": 65536, "type": "commit"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 67108864, "offse= t": 524288, "speed": 65536, "type": "commit"}} =20 =3D=3D=3D Start active commit job and exit qemu =3D=3D=3D =20 @@ -28,8 +28,7 @@ Formatting 'TEST_DIR/t.qcow2', fmt=3Dqcow2 size=3D6710886= 4 backing_file=3DTEST_DIR/t.q {"return": {}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "SHUTDOWN", "data": {"guest": false}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_READY", "data": {"device": "disk", "len": 4194304, "offset": 4= 194304, "speed": 65536, "type": "commit"}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_COMPLETED", "data": {"device": "disk", "len": 4194304, "offset= ": 4194304, "speed": 65536, "type": "commit"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 4194304, "offset= ": 4194304, "speed": 65536, "type": "commit"}} =20 =3D=3D=3D Start mirror job and exit qemu =3D=3D=3D =20 @@ -38,8 +37,7 @@ Formatting 'TEST_DIR/t.qcow2.copy', fmt=3Dqcow2 size=3D67= 108864 cluster_size=3D65536 l {"return": {}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "SHUTDOWN", "data": {"guest": false}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_READY", "data": {"device": "disk", "len": 4194304, "offset": 4= 194304, "speed": 65536, "type": "mirror"}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_COMPLETED", "data": {"device": "disk", "len": 4194304, "offset= ": 4194304, "speed": 65536, "type": "mirror"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 4194304, "offset= ": 4194304, "speed": 65536, "type": "mirror"}} =20 =3D=3D=3D Start backup job and exit qemu =3D=3D=3D =20 @@ -48,7 +46,7 @@ Formatting 'TEST_DIR/t.qcow2.copy', fmt=3Dqcow2 size=3D67= 108864 cluster_size=3D65536 l {"return": {}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "SHUTDOWN", "data": {"guest": false}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 67108864, "offse= t": 131072, "speed": 65536, "type": "backup"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 67108864, "offse= t": 65536, "speed": 65536, "type": "backup"}} =20 =3D=3D=3D Start streaming job and exit qemu =3D=3D=3D =20 @@ -56,6 +54,6 @@ Formatting 'TEST_DIR/t.qcow2.copy', fmt=3Dqcow2 size=3D67= 108864 cluster_size=3D65536 l {"return": {}} {"return": {}} {"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "SHUTDOWN", "data": {"guest": false}} -{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 67108864, "offse= t": 1048576, "speed": 65536, "type": "stream"}} +{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event"= : "BLOCK_JOB_CANCELLED", "data": {"device": "disk", "len": 67108864, "offse= t": 524288, "speed": 65536, "type": "stream"}} No errors were found on the image. *** done --=20 2.13.6