From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80535C433B4 for ; Thu, 15 Apr 2021 14:06:50 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 16E1B61153 for ; Thu, 15 Apr 2021 14:06:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16E1B61153 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:33014 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lX2dt-0004HH-1z for qemu-devel@archiver.kernel.org; Thu, 15 Apr 2021 10:06:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53324) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lX2WT-0005IC-6L for qemu-devel@nongnu.org; Thu, 15 Apr 2021 09:59:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:44300) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lX2WR-00022U-Ik for qemu-devel@nongnu.org; Thu, 15 Apr 2021 09:59:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618495146; 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=gOjm/lrrp+5iRv6wLwsDJOt1LxSOxZjY9L6noJbDg7k=; b=daeX9C8juHNGjz0Z1oFkU8syYfq7/VSwNr4ZYEYIxGJ26MgReCddZRJ6P5ruu1ufAvrgjJ +IKHsgX+9jiGeDgqtZFfzcbH12EffyBzC/F8OB80VMCBLSWVs06r4G/vZRBRDUIOiYmYyQ 9lFavrepnqzgu+o4ySV/cjSOEz1jPcM= 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-458-AB-zlDMPPEKJIYBVjfIRkw-1; Thu, 15 Apr 2021 09:59:05 -0400 X-MC-Unique: AB-zlDMPPEKJIYBVjfIRkw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 39B43107ACCA; Thu, 15 Apr 2021 13:59:04 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-115-159.ams2.redhat.com [10.36.115.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA8AB6A97C; Thu, 15 Apr 2021 13:59:01 +0000 (UTC) From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH 2/5] softmmu: add trace point when bdrv_flush_all fails Date: Thu, 15 Apr 2021 14:58:48 +0100 Message-Id: <20210415135851.862406-3-berrange@redhat.com> In-Reply-To: <20210415135851.862406-1-berrange@redhat.com> References: <20210415135851.862406-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 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: 8bit 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: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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=ham 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 , Richard Henderson , "Dr. David Alan Gilbert" , Max Reitz , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 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. Signed-off-by: Daniel P. Berrangé --- 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" #ifdef CONFIG_LINUX @@ -266,6 +267,7 @@ static int do_vm_stop(RunState state, bool send_stop) bdrv_drain_all(); ret = bdrv_flush_all(); + trace_vm_stop_flush_all(ret); 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); bdrv_drain_all(); /* Make sure to return an error if the flush in a previous vm_stop() * failed. */ - return bdrv_flush_all(); + ret = bdrv_flush_all(); + trace_vm_stop_flush_all(ret); + return ret; } } diff --git a/softmmu/trace-events b/softmmu/trace-events index b80ca042e1..f11b427544 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)" +# 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" -- 2.30.2