From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52921) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X756V-0008Hz-E7 for qemu-devel@nongnu.org; Tue, 15 Jul 2014 11:57:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X756M-0002SJ-6O for qemu-devel@nongnu.org; Tue, 15 Jul 2014 11:57:19 -0400 Received: from mail-qa0-x231.google.com ([2607:f8b0:400d:c00::231]:60512) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X756M-0002QO-0i for qemu-devel@nongnu.org; Tue, 15 Jul 2014 11:57:10 -0400 Received: by mail-qa0-f49.google.com with SMTP id dc16so4611601qab.22 for ; Tue, 15 Jul 2014 08:57:09 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <53C54F51.1050000@redhat.com> Date: Tue, 15 Jul 2014 17:57:05 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] latest rc: virtio-blk hangs forever after migration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Andrey Korolyov , "qemu-devel@nongnu.org" Cc: Fam Zheng Il 13/07/2014 17:29, Andrey Korolyov ha scritto: > Small follow-up: issue have probabilistic nature, as it looks - by > limited number of runs, it is reproducible within three cases: > 1) live migration went well, I/O locked up, > 2) live migration failed by timeout, I/O locked up, > 3) live migration went well and disk was not locked, but on backward > migration we are always hitting 2). Can you provide a gdb backtrace of case (2)? Paolo