From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33920) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZG78-0005em-OA for qemu-devel@nongnu.org; Tue, 08 Sep 2015 06:26:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZZG74-0000fX-LZ for qemu-devel@nongnu.org; Tue, 08 Sep 2015 06:26:58 -0400 Received: from mail-wi0-x22a.google.com ([2a00:1450:400c:c05::22a]:34550) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZG74-0000fN-76 for qemu-devel@nongnu.org; Tue, 08 Sep 2015 06:26:54 -0400 Received: by wicfx3 with SMTP id fx3so114496310wic.1 for ; Tue, 08 Sep 2015 03:26:53 -0700 (PDT) Sender: Paolo Bonzini References: <1441699228-25767-1-git-send-email-den@openvz.org> <55EEAB55.2070908@redhat.com> <20150908102217.GA12263@stefanha-thinkpad.redhat.com> From: Paolo Bonzini Message-ID: <55EEB7EC.2050006@redhat.com> Date: Tue, 8 Sep 2015 12:26:52 +0200 MIME-Version: 1.0 In-Reply-To: <20150908102217.GA12263@stefanha-thinkpad.redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH RFC 0/5] disk deadlines List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: Kevin Wolf , "Denis V. Lunev" , qemu-devel@nongnu.org, Raushaniya Maksudova On 08/09/2015 12:22, Stefan Hajnoczi wrote: > Guests running without this patch series may suffer from the NFS "soft" > mounts problem when they time out and give up on the I/O request just as > it actually completes on the server, leaving the data in a different > state than expected. > > This patch series solves that problem by pausing the guest. Action can > be taken on the host to bring storage back and resume (similar to > ENOSPC). Serves me right for going too fast through the cover letter. This sounds like a great solution to the problem. Paolo