From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53629) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ag8h9-00080A-AK for qemu-devel@nongnu.org; Wed, 16 Mar 2016 06:28:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ag8h8-0003jB-Gk for qemu-devel@nongnu.org; Wed, 16 Mar 2016 06:28:51 -0400 Sender: Paolo Bonzini References: <1458123018-18651-1-git-send-email-famz@redhat.com> From: Paolo Bonzini Message-ID: <56E9355A.5070700@redhat.com> Date: Wed, 16 Mar 2016 11:28:42 +0100 MIME-Version: 1.0 In-Reply-To: <1458123018-18651-1-git-send-email-famz@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/4] Tweaks around virtio-blk start/stop List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Fam Zheng , qemu-devel@nongnu.org Cc: Kevin Wolf , qemu-block@nongnu.org, "Michael S. Tsirkin" , tubo@linux.vnet.ibm.com, Stefan Hajnoczi , cornelia.huck@de.ibm.com, borntraeger@de.ibm.com On 16/03/2016 11:10, Fam Zheng wrote: > These are some ideas originated from analyzing the Christian's crash report on > virtio-blk dataplane torture test: > > https://lists.gnu.org/archive/html/qemu-devel/2016-03/msg02093.html > > The ideas are mostly inspired/suggested by Paolo. This doesn't fix the bug, but > the first and the last patches seem to make the crash less frequent. Also > thanks Cornelia Huck for reviewing the draft version posted in that thread. I see you have fixed the mutex and started check in patch 4, so perhaps this fixes the bug. :) Bo or Christian, could you try it out---and if it works try patches 2 to 4 only? Thanks, Paolo