From nobody Sun Feb 8 16:34:10 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.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 1623680666722389.88431885648924; Mon, 14 Jun 2021 07:24:26 -0700 (PDT) Received: from localhost ([::1]:42574 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsnVq-0002Tn-0C for importer@patchew.org; Mon, 14 Jun 2021 10:24:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34786) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsnOO-0004ks-Qs for qemu-devel@nongnu.org; Mon, 14 Jun 2021 10:16:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:20872) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsnON-000812-7d for qemu-devel@nongnu.org; Mon, 14 Jun 2021 10:16:44 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-268-BqnLMTcAOLOZYSG2l7FjCQ-1; Mon, 14 Jun 2021 10:16:39 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3DEFB100C660; Mon, 14 Jun 2021 14:16:38 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-115-55.ams2.redhat.com [10.36.115.55]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3E02519C46; Mon, 14 Jun 2021 14:16:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623680202; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JpcXuHQEC0d40yWHtoqur6ujpCUwQ79ARNwSQygQSqU=; b=C0giHTG4KKtnN6HxGpggwy8raNM8jHn2u4LXVA9sz1Wojqtx5c21wZjdFfYgiHcrDNxYYQ AN0U4wcBY+kLYPKsVrS/Bupo5cm6I8KZ5PliOr9cednTTbX1b1qvedrOGvWjuSzWodfIYL Jj3lSMsPNqqvjvaBSFkaV10pX19ueQk= X-MC-Unique: BqnLMTcAOLOZYSG2l7FjCQ-1 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Subject: [PULL 07/13] softmmu: add trace point when bdrv_flush_all fails Date: Mon, 14 Jun 2021 15:15:43 +0100 Message-Id: <20210614141549.100410-8-berrange@redhat.com> In-Reply-To: <20210614141549.100410-1-berrange@redhat.com> References: <20210614141549.100410-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.2, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , qemu-block@nongnu.org, Juan Quintela , Connor Kuehl , Michael Roth , Richard Henderson , Markus Armbruster , Max Reitz , Gerd Hoffmann , Paolo Bonzini , "Dr. David Alan Gilbert" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) The VM stop process has to flush outstanding I/O and this is a critical failure scenario that is hard to diagnose. Add a probe point that records the flush return code. Reviewed-by: Connor Kuehl Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrang=C3=A9 --- softmmu/cpus.c | 7 ++++++- softmmu/trace-events | 3 +++ 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/softmmu/cpus.c b/softmmu/cpus.c index a7ee431187..c3caaeb26e 100644 --- a/softmmu/cpus.c +++ b/softmmu/cpus.c @@ -44,6 +44,7 @@ #include "sysemu/whpx.h" #include "hw/boards.h" #include "hw/hw.h" +#include "trace.h" =20 #ifdef CONFIG_LINUX =20 @@ -266,6 +267,7 @@ static int do_vm_stop(RunState state, bool send_stop) =20 bdrv_drain_all(); ret =3D bdrv_flush_all(); + trace_vm_stop_flush_all(ret); =20 return ret; } @@ -704,12 +706,15 @@ int vm_stop_force_state(RunState state) if (runstate_is_running()) { return vm_stop(state); } else { + int ret; runstate_set(state); =20 bdrv_drain_all(); /* Make sure to return an error if the flush in a previous vm_stop= () * failed. */ - return bdrv_flush_all(); + ret =3D bdrv_flush_all(); + trace_vm_stop_flush_all(ret); + return ret; } } =20 diff --git a/softmmu/trace-events b/softmmu/trace-events index 5262828b8d..d18ac41e4e 100644 --- a/softmmu/trace-events +++ b/softmmu/trace-events @@ -19,6 +19,9 @@ flatview_new(void *view, void *root) "%p (root %p)" flatview_destroy(void *view, void *root) "%p (root %p)" flatview_destroy_rcu(void *view, void *root) "%p (root %p)" =20 +# softmmu.c +vm_stop_flush_all(int ret) "ret %d" + # vl.c vm_state_notify(int running, int reason, const char *reason_str) "running = %d reason %d (%s)" load_file(const char *name, const char *path) "name %s location %s" --=20 2.31.1