From nobody Mon Nov 10 10:14:41 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=1; a=rsa-sha256; t=1555003761; cv=none; d=zoho.com; s=zohoarc; b=nY9mpJE4RkWGv4gqThPZjrmATNSl1bTYFdGPjHsPitTxLhJ+yGj8JM5FswIZ8Vu04/ornq+9yIou43QAOtcXTOLzUcnTl7HEGGBVUChtTCaszIqCDIpbuozbYiQBOdUjZe/Q/vbm8dpt9vefXu7C+C78RHuiq42e3f+Ra9NQ4gQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1555003761; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=1kqFn0pA2I3tptSK56dtKIQMWMpOFUjWQb3k4AJd1zM=; b=UqrDnsr2UgNokUrxujJbYRK4GWF5KHrMgHC4LO49AjmPl5G1AsE2lxl/gdPXNZ5h8t/gGR3NjaRAwpxz1R7OB2vjvozm3K1ulA0s1QWyeLYoJ2pPP2w+8SO4s8Th93NiKP8IobQyNEo+qb39glreLBA8WdgEwV9HMjIoyxtpBes= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1555003761212597.4916044001446; Thu, 11 Apr 2019 10:29:21 -0700 (PDT) Received: from localhost ([127.0.0.1]:52549 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hEdVf-0005jJ-II for importer@patchew.org; Thu, 11 Apr 2019 13:29:11 -0400 Received: from eggs.gnu.org ([209.51.188.92]:50426) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hEdTm-0004ZH-Vt for qemu-devel@nongnu.org; Thu, 11 Apr 2019 13:27:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hEdTl-0003bl-Qs for qemu-devel@nongnu.org; Thu, 11 Apr 2019 13:27:14 -0400 Received: from relay.sw.ru ([185.231.240.75]:59344) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hEdTl-0003Zv-D7; Thu, 11 Apr 2019 13:27:13 -0400 Received: from [10.28.8.145] (helo=kvm.sw.ru) by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1hEdTj-00044D-2R; Thu, 11 Apr 2019 20:27:11 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Thu, 11 Apr 2019 20:27:07 +0300 Message-Id: <20190411172709.205032-6-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190411172709.205032-1-vsementsov@virtuozzo.com> References: <20190411172709.205032-1-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 185.231.240.75 Subject: [Qemu-devel] [PATCH v6 5/7] qemu-coroutine-sleep: introduce qemu_co_sleep_wake 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: kwolf@redhat.com, vsementsov@virtuozzo.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Introduce a function to gracefully wake-up a coroutine, sleeping in qemu_co_sleep_ns() sleep. Signed-off-by: Vladimir Sementsov-Ogievskiy --- include/qemu/coroutine.h | 6 ++++++ util/qemu-coroutine-sleep.c | 20 ++++++++++++++++---- 2 files changed, 22 insertions(+), 4 deletions(-) diff --git a/include/qemu/coroutine.h b/include/qemu/coroutine.h index 9801e7f5a4..ec765c26f0 100644 --- a/include/qemu/coroutine.h +++ b/include/qemu/coroutine.h @@ -278,6 +278,12 @@ void qemu_co_rwlock_unlock(CoRwlock *lock); */ void coroutine_fn qemu_co_sleep_ns(QEMUClockType type, int64_t ns); =20 +/* + * Wake a coroutine if it is sleeping by qemu_co_sleep_ns. Timer will be + * deleted. + */ +void qemu_co_sleep_wake(Coroutine *co); + /** * Yield until a file descriptor becomes readable * diff --git a/util/qemu-coroutine-sleep.c b/util/qemu-coroutine-sleep.c index 4bfdd30cbf..bcc6afca3e 100644 --- a/util/qemu-coroutine-sleep.c +++ b/util/qemu-coroutine-sleep.c @@ -17,13 +17,24 @@ #include "qemu/timer.h" #include "block/aio.h" =20 +const char *qemu_co_sleep_ns__scheduled =3D "qemu_co_sleep_ns"; + +void qemu_co_sleep_wake(Coroutine *co) +{ + /* Write of schedule protected by barrier write in aio_co_schedule */ + const char *scheduled =3D atomic_cmpxchg(&co->scheduled, + qemu_co_sleep_ns__scheduled, NU= LL); + + if (scheduled =3D=3D qemu_co_sleep_ns__scheduled) { + aio_co_wake(co); + } +} + static void co_sleep_cb(void *opaque) { Coroutine *co =3D opaque; =20 - /* Write of schedule protected by barrier write in aio_co_schedule */ - atomic_set(&co->scheduled, NULL); - aio_co_wake(co); + qemu_co_sleep_wake(co); } =20 void coroutine_fn qemu_co_sleep_ns(QEMUClockType type, int64_t ns) @@ -32,7 +43,8 @@ void coroutine_fn qemu_co_sleep_ns(QEMUClockType type, in= t64_t ns) QEMUTimer *ts; Coroutine *co =3D qemu_coroutine_self(); =20 - const char *scheduled =3D atomic_cmpxchg(&co->scheduled, NULL, __func_= _); + const char *scheduled =3D atomic_cmpxchg(&co->scheduled, NULL, + qemu_co_sleep_ns__scheduled); if (scheduled) { fprintf(stderr, "%s: Co-routine was already scheduled in '%s'\n", --=20 2.18.0