From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <45DDCD38.6000807@redhat.com> Date: Thu, 22 Feb 2007 12:04:56 -0500 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH] Take anonymous pages off the LRU if we have no swap References: <45DCD309.5010109@redhat.com> <45DCFD22.2020300@redhat.com> <45DD88E3.2@redhat.com> <45DDB85D.209@in.ibm.com> In-Reply-To: <45DDB85D.209@in.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: balbir@in.ibm.com Cc: Christoph Lameter , akpm@linux-foundation.org, linux-mm@kvack.org, Vaidyanathan Srinivasan List-ID: Balbir Singh wrote: > Rik van Riel wrote: >> Christoph Lameter wrote: >>> On Wed, 21 Feb 2007, Rik van Riel wrote: >>> >> Absolutely. I am convinced that the whole "swappiness" thing >> of scanning past the anonymous pages in order to find the page >> cache pages will fall apart on 256GB systems even with somewhat >> friendly workloads. > > That should probably make a good case for splitting the LRU > into unmapped and mapped page LRU's :-) Please read http://linux-mm.org/PageReplacementDesign. There are good reasons why the split should probably be between anonymous/swap backed and file backed pages, not between mapped and unmapped. > I hope to get to it, implement it and get some results. Ditto here :) -- 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