From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38910) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1acvOQ-0004cG-Rn for qemu-devel@nongnu.org; Mon, 07 Mar 2016 08:40:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1acvOO-0004JT-GB for qemu-devel@nongnu.org; Mon, 07 Mar 2016 08:40:14 -0500 Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:36511) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1acvOO-0004J9-72 for qemu-devel@nongnu.org; Mon, 07 Mar 2016 08:40:12 -0500 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 7 Mar 2016 13:40:10 -0000 References: <56DD7414.9080306@de.ibm.com> <56DD8399.1000504@redhat.com> From: Christian Borntraeger Message-ID: <56DD84B5.8010206@de.ibm.com> Date: Mon, 7 Mar 2016 14:40:05 +0100 MIME-Version: 1.0 In-Reply-To: <56DD8399.1000504@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] strange crash in tracked_request_begin List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini , qemu-block@nongnu.org Cc: qemu-devel , Stefan Hajnoczi On 03/07/2016 02:35 PM, Paolo Bonzini wrote: > > > On 07/03/2016 13:29, Christian Borntraeger wrote: >> Folks, >> >> I had a crash of a qemu guest in tracked_request_begin. >> The testcase was a guest with ramdisk/kernel that reboots in a >> loop. (about 10 times per second) with a single null-co disk >> attached. > > Does it use a separate iothread? yes libvirt kludge (why is there no null-co/null-aio in libvirt?) looks like