Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753601AbZGLUny (ORCPT ); Sun, 12 Jul 2009 16:43:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751297AbZGLUnq (ORCPT ); Sun, 12 Jul 2009 16:43:46 -0400 Received: from mx2.redhat.com ([66.187.237.31]:52919 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751042AbZGLUnq (ORCPT ); Sun, 12 Jul 2009 16:43:46 -0400 Message-ID: <4A5A4AF2.40609@redhat.com> Date: Sun, 12 Jul 2009 23:43:30 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Thunderbird/3.0b2 MIME-Version: 1.0 To: Dan Magenheimer CC: npiggin@suse.de, akpm@osdl.org, xen-devel@lists.xensource.com, tmem-devel@oss.oracle.com, kurt.hackel@oracle.com, Rusty Russell , jeremy@goop.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, sunil.mushran@oracle.com, chris.mason@oracle.com, Anthony Liguori , Schwidefsky , dave.mccracken@oracle.com, Marcelo Tosatti , alan@lxorguk.ukuu.org.uk, Balbir Singh Subject: Re: [Xen-devel] Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux References: In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 881 Lines: 25 On 07/12/2009 11:39 PM, Dan Magenheimer wrote: >> Right, the transient uses of tmem when applied to disk objects >> (swap/pagecache) are very similar to disk caches. Which is >> why you can >> get a very similar effect when caching your virtual disks; >> this can be >> done without any guest modification. >> > > Write-through backing and virtual disk cacheing offer a > similar effect, but it is far from the same. > Can you explain how it differs for the swap case? Maybe I don't understand how tmem preswap works. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/