From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 4F6DF6B0055 for ; Sun, 12 Jul 2009 16:25:43 -0400 (EDT) Message-ID: <4A5A4AF2.40609@redhat.com> Date: Sun, 12 Jul 2009 23:43:30 +0300 From: Avi Kivity MIME-Version: 1.0 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: owner-linux-mm@kvack.org 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 List-ID: 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org