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spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:33672 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUSpW-0003jn-Ju for qemu-devel@archiver.kernel.org; Thu, 08 Apr 2021 07:28:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55438) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUSoo-0003JZ-Su for qemu-devel@nongnu.org; Thu, 08 Apr 2021 07:27:26 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:58426) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUSom-0001pO-5t for qemu-devel@nongnu.org; Thu, 08 Apr 2021 07:27:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617881243; 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=qTSbadPx+wfP7E6gZAs7P+DSY5WGq0chXgXICGSCSPQ=; b=SGD6wo7ynEisDjVH5LF3U8Q4mQ1LxmV+K29wizvLJNZTPWD4P3qnEgkMmWLWf0GUvNv01F T0H4yxHvZ5EAFXn/3O2CAs9Aw+izEXHLAxPK8+tvhJsjzCgEI1q+CMOcDX7omjUcLTfozv q+/bP/f7zBjbDxF1zzpcahagTbyBnJU= 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-372-9LtzH-hdMU-5x2SADGGf4Q-1; Thu, 08 Apr 2021 07:27:20 -0400 X-MC-Unique: 9LtzH-hdMU-5x2SADGGf4Q-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4AE6A1095348; Thu, 8 Apr 2021 11:27:05 +0000 (UTC) Received: from work-vm (ovpn-115-38.ams2.redhat.com [10.36.115.38]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1715D5D9CC; Thu, 8 Apr 2021 11:27:03 +0000 (UTC) Date: Thu, 8 Apr 2021 12:27:01 +0100 From: "Dr. David Alan Gilbert" To: Yuchen , pbonzini@redhat.com, mst@redhat.com Subject: Re: [Qemu-devel][bug] qemu crash when migrate vm and vm's disks Message-ID: References: <9cd6ccabceff42f9afbaed917f77c9b2@h3c.com> MIME-Version: 1.0 In-Reply-To: <9cd6ccabceff42f9afbaed917f77c9b2@h3c.com> User-Agent: Mutt/2.0.6 (2021-03-06) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=dgilbert@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: "qemu-devel@nongnu.org" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Yuchen (yu.chen@h3c.com) wrote: > When migrate vm and vm’s disks target host qemu crash due to an invalid free. > > #0 object_unref (obj=0x1000) at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/qom/object.c:920 > #1 0x0000560434d79e79 in memory_region_unref (mr=) > at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:1730 > #2 flatview_destroy (view=0x560439653880) at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:292 > #3 0x000056043514dfbe in call_rcu_thread (opaque=) > at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/util/rcu.c:284 > #4 0x00007fbc2b36fe25 in start_thread () from /lib64/libpthread.so.0 > #5 0x00007fbc2b099bad in clone () from /lib64/libc.so.6 > > test base qemu-2.12.0，but use lastest qemu(v6.0.0-rc2) also reproduce. Interesting. > As follow patch can resolve this problem: > https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg02272.html That's a pci/rcu change; ccing Paolo and Micahel. > Steps to reproduce: > (1) Create VM (virsh define) > (2) Add 64 virtio scsi disks Is that hot adding the disks later, or are they included in the VM at creation? Can you provide a libvirt XML example? > (3) migrate vm and vm’disks What do you mean by 'and vm disks' - are you doing a block migration? Dave > ------------------------------------------------------------------------------------------------------------------------------------- > 本邮件及其附件含有新华三集团的保密信息，仅限于发送给上面地址中列出 > 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 > 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 > 邮件！ > This e-mail and its attachments contain confidential information from New H3C, which is > intended only for the person or entity whose address is listed above. Any use of the > information contained herein in any way (including, but not limited to, total or partial > disclosure, reproduction, or dissemination) by persons other than the intended > recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender > by phone or email immediately and delete it! -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK