From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with SMTP id 74A3D6B004D for ; Sat, 15 Aug 2009 23:57:04 -0400 (EDT) Message-ID: <4A878377.70502@redhat.com> Date: Sat, 15 Aug 2009 23:56:39 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [RFC] respect the referenced bit of KVM guest pages? References: <20090805024058.GA8886@localhost> <20090805155805.GC23385@random.random> <20090806100824.GO23385@random.random> <4A7AAE07.1010202@redhat.com> <20090806102057.GQ23385@random.random> <20090806105932.GA1569@localhost> <4A7AC201.4010202@redhat.com> <20090806130631.GB6162@localhost> <4A7AD79E.4020604@redhat.com> <20090816032822.GB6888@localhost> In-Reply-To: <20090816032822.GB6888@localhost> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Wu Fengguang Cc: Avi Kivity , Andrea Arcangeli , "Dike, Jeffrey G" , "Yu, Wilfred" , "Kleen, Andi" , Hugh Dickins , Andrew Morton , Christoph Lameter , KOSAKI Motohiro , Mel Gorman , LKML , linux-mm List-ID: Wu Fengguang wrote: > Right, but I meant busty page allocations and accesses on them, which > can make a large continuous segment of referenced pages in LRU list, > say 50MB. They may or may not be valuable as a whole, however a local > algorithm may keep the first 4MB and drop the remaining 46MB. I wonder if the problem is that we simply do not keep a large enough inactive list in Jeff's test. If we do not, pages do not have a chance to be referenced again before the reclaim code comes in. The cgroup stats should show how many active anon and inactive anon pages there are in the cgroup. -- All rights reversed. -- 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