From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: the >1Tb block issue Date: Tue, 18 May 2010 20:38:22 +0300 Message-ID: <4BF2D08E.7000505@redhat.com> References: <4BF2B7CD.7090204@msgid.tls.msk.ru> <4BF2CE70.1060402@redhat.com> <4BF2CFAB.1010505@msgid.tls.msk.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: KVM list , Christoph Hellwig To: Michael Tokarev Return-path: Received: from mx1.redhat.com ([209.132.183.28]:26025 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756398Ab0ERRij (ORCPT ); Tue, 18 May 2010 13:38:39 -0400 In-Reply-To: <4BF2CFAB.1010505@msgid.tls.msk.ru> Sender: kvm-owner@vger.kernel.org List-ID: On 05/18/2010 08:34 PM, Michael Tokarev wrote: > 18.05.2010 21:29, Avi Kivity wrote: >> On 05/18/2010 06:52 PM, Michael Tokarev wrote: >>> I just re-verified it on current stable >>> qemu-kvm-0.12.4. The issue is still here, >>> trivial to trigger. >> >> Can you try the patch I just posted? > > Applied this one: > > [Qemu-devel] [PATCH +stable] block: don't attempt to merge > overlapping requests > > quick tests shows it works correctly so far. > At least it went further than before, not > stopping at the "usual" sector 3145727872. > > Hmm. Ide has no queue, hence no mergeing, > that's why it does not occur with ide, > right? :) > Yes. > Interesting... Yes. Why would Linux post overlapping requests? makes 0xffffffff00000000 sense. There may be a guest bug in here too. Christoph? -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.