From nobody Sun Feb 8 21:47:30 2026 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=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1550507571510158.18501546255266; Mon, 18 Feb 2019 08:32:51 -0800 (PST) Received: from localhost ([127.0.0.1]:33280 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gvlqa-0007r5-Hy for importer@patchew.org; Mon, 18 Feb 2019 11:32:48 -0500 Received: from eggs.gnu.org ([209.51.188.92]:34926) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gvldS-0006Mx-2s for qemu-devel@nongnu.org; Mon, 18 Feb 2019 11:19:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gvldR-0002Se-6P for qemu-devel@nongnu.org; Mon, 18 Feb 2019 11:19:14 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59268) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gvldO-0002PU-N0; Mon, 18 Feb 2019 11:19:10 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id ED0A481DEA; Mon, 18 Feb 2019 16:19:09 +0000 (UTC) Received: from dhcp-200-176.str.redhat.com (dhcp-200-176.str.redhat.com [10.33.200.176]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5719F5D70E; Mon, 18 Feb 2019 16:19:08 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Date: Mon, 18 Feb 2019 17:18:22 +0100 Message-Id: <20190218161822.3573-13-kwolf@redhat.com> In-Reply-To: <20190218161822.3573-1-kwolf@redhat.com> References: <20190218161822.3573-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Mon, 18 Feb 2019 16:19:10 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 12/12] aio-posix: Assert that aio_poll() is always called in home thread 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, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" aio_poll() has an existing assertion that the function is only called from the AioContext's home thread if blocking is allowed. This is not enough, some handlers make assumptions about the thread they run in. Extend the assertion to non-blocking calls, too. Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake --- util/aio-posix.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/util/aio-posix.c b/util/aio-posix.c index 8640dfde9f..6fbfa7924f 100644 --- a/util/aio-posix.c +++ b/util/aio-posix.c @@ -613,6 +613,8 @@ bool aio_poll(AioContext *ctx, bool blocking) int64_t timeout; int64_t start =3D 0; =20 + assert(in_aio_context_home_thread(ctx)); + /* aio_notify can avoid the expensive event_notifier_set if * everything (file descriptors, bottom halves, timers) will * be re-evaluated before the next blocking poll(). This is @@ -621,7 +623,6 @@ bool aio_poll(AioContext *ctx, bool blocking) * so disable the optimization now. */ if (blocking) { - assert(in_aio_context_home_thread(ctx)); atomic_add(&ctx->notify_me, 2); } =20 --=20 2.20.1