From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Denis V. Lunev" Subject: Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop is hanging forever Date: Mon, 9 Nov 2015 10:22:34 +0300 Message-ID: <564049BA.1090805@parallels.com> References: <310812067.2785504.1447038645014.JavaMail.zimbra@oxygem.tv> <5640490B.5030700@parallels.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from relay.parallels.com ([195.214.232.42]:40966 "EHLO relay.parallels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750833AbbKIHWp (ORCPT ); Mon, 9 Nov 2015 02:22:45 -0500 In-Reply-To: <5640490B.5030700@parallels.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Alexandre DERUMIER , ceph-devel , qemu-devel On 11/09/2015 10:19 AM, Denis V. Lunev wrote: > On 11/09/2015 06:10 AM, Alexandre DERUMIER wrote: >> Hi, >> >> with qemu (2.4.1), if I do an internal snapshot of an rbd device, >> then I pause the vm with vm_stop, >> >> the qemu process is hanging forever >> >> >> monitor commands to reproduce: >> >> >> # snapshot_blkdev_internal drive-virtio0 yoursnapname >> # stop >> >> >> >> >> I don't see this with qcow2 or sheepdog block driver for example. >> >> >> Regards, >> >> Alexandre >> > this could look like the problem I have recenty trying to > fix with dataplane enabled. Patch series is named as > > [PATCH for 2.5 v6 0/10] dataplane snapshot fixes > > Den anyway, even if above will not help, can you collect gdb traces from all threads in QEMU process. May be I'll be able to give a hit. Den