From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: sync guest calls made async on host - SQLite performance Date: Thu, 15 Oct 2009 14:36:30 +0200 Message-ID: <20091015123630.GA4671@lst.de> References: <4ACF89CB.5020406@gmail.com> <4AD1A27A.4060307@redhat.com> <20091013223714.GB16152@lst.de> <4AD5B00D.102@redhat.com> <20091014134122.GA14235@lst.de> <4AD602C8.4090603@redhat.com> <20091014170215.GA22621@lst.de> <4AD6569F.80803@codemonkey.ws> <20091015121702.GA3780@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Christoph Hellwig , Avi Kivity , Matthew Tippett , Dustin Kirkland , RW , kvm@vger.kernel.org To: Anthony Liguori Return-path: Received: from verein.lst.de ([213.95.11.210]:47075 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753358AbZJOMhW (ORCPT ); Thu, 15 Oct 2009 08:37:22 -0400 Content-Disposition: inline In-Reply-To: <20091015121702.GA3780@lst.de> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, Oct 15, 2009 at 02:17:02PM +0200, Christoph Hellwig wrote: > On Wed, Oct 14, 2009 at 05:54:23PM -0500, Anthony Liguori wrote: > > >Historically it didn't and the only safe way to use virtio was in > > >cache=writethrough mode. > > > > Which should be the default on Ubuntu's kvm that this report is > > concerned with so I'm a bit confused. > > So can we please get the detailed setup where this happens, that is: > > filesystem used in the guest > any volume manager / software raid used in the guest > kernel version in the guest > image format used > qemu command line including caching mode, using ide/scsi/virtio, etc > qemu/kvm version > filesystem used in the host > any volume manager / software raid used in the host > kernel version in the host And very important the mount options (/proc/self/mounts) of both host and guest.