From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59743) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XUcWJ-0006o4-3H for qemu-devel@nongnu.org; Thu, 18 Sep 2014 10:17:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XUcW8-0007LE-5Y for qemu-devel@nongnu.org; Thu, 18 Sep 2014 10:17:15 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:50443 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XUcW7-0007KM-RR for qemu-devel@nongnu.org; Thu, 18 Sep 2014 10:17:04 -0400 Message-ID: <541AE955.4090404@kamp.de> Date: Thu, 18 Sep 2014 16:16:53 +0200 From: Peter Lieven MIME-Version: 1.0 References: <1409935888-18552-1-git-send-email-pl@kamp.de> <1409935888-18552-3-git-send-email-pl@kamp.de> <20140908134434.GB22582@irqsave.net> <540DB3E2.6010905@redhat.com> <540DB583.4030101@kamp.de> <540DB5EB.2070705@redhat.com> <540DBEBD.9040701@kamp.de> <540DC059.4000907@redhat.com> <540DC7FB.1040804@redhat.com> <540DC8D7.80905@kamp.de> <540DCAE8.4060701@redhat.com> <29A6ECA0-C6CE-4557-80CA-31FD2CA199A2@kamp.de> <540DD986.8010301@redhat.com> <5412DC5D.7050406@kamp.de> <541AE83A.9080705@redhat.com> In-Reply-To: <541AE83A.9080705@redhat.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: =?windows-1252?Q?Beno=EEt_Canet?= , Kevin Wolf , ronnie sahlberg , qemu-devel , Max Reitz , Stefan Hajnoczi On 18.09.2014 16:12, Paolo Bonzini wrote: > Il 12/09/2014 13:43, Peter Lieven ha scritto: >> As you can see from the multiwrite_merge trace the merging has never been stopped because of >> the max_transfer_length. The question is, why are the I/O requests not coming in as specified? > I think that's because of the filesystem. Try writing directly to a device. thats what I did...