From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([140.186.70.92]:55268)
	by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <hch@lst.de>)
	id 1QAusw-0006t8-JR
	for qemu-devel@nongnu.org; Fri, 15 Apr 2011 22:05:22 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <hch@lst.de>) id 1QAusv-0005KO-3F
	for qemu-devel@nongnu.org; Fri, 15 Apr 2011 22:05:18 -0400
Received: from verein.lst.de ([213.95.11.211]:38860 helo=newverein.lst.de)
	by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <hch@lst.de>)
	id 1QAusu-0005KK-Um
	for qemu-devel@nongnu.org; Fri, 15 Apr 2011 22:05:17 -0400
Date: Sat, 16 Apr 2011 04:05:16 +0200
From: Christoph Hellwig <hch@lst.de>
Message-ID: <20110416020516.GB11264@lst.de>
References: <1302874855-14736-1-git-send-email-stefanha@linux.vnet.ibm.com>
	<20110415150513.GA29619@lst.de>
	<BANLkTim7jON_CRmdN0k8Spkw7_HFfmMT6w@mail.gmail.com>
	<20110415153448.GA30116@lst.de>
	<1302884634.32391.3.camel@badari-desktop>
	<20110415172909.GB303@lst.de> <4DA8C4F0.4080507@us.ibm.com>
	<4DA8CE00.3090907@us.ibm.com> <4DA8D5DF.5070503@us.ibm.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4DA8D5DF.5070503@us.ibm.com>
Subject: Re: [Qemu-devel] [PATCH] raw-posix: Linearize direct I/O on
	Linux	NFS
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <http://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>, Stefan Hajnoczi <stefanha@gmail.com>, qemu-devel@nongnu.org, Khoa Huynh <khoa@us.ibm.com>, pbadari@linux.vnet.ibm.com, Christoph Hellwig <hch@lst.de>

On Fri, Apr 15, 2011 at 04:33:51PM -0700, Badari Pulavarty wrote:
> To be honest with you, we should kill cache=none and just optimize only one 
> case and live with it (like other commerical
> hypervisor). :(

cache=none is the only sane mode for qemu, modulo bugs in nfs or similar weird
protocols that no sane person should use for VM storage.

>