From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by wx-out-0506.google.com with SMTP id s8so528521wxc for ; Fri, 19 Jan 2007 08:05:02 -0800 (PST) Message-ID: <6d6a94c50701190805saa0c7bbgbc59d2251bed8537@mail.gmail.com> Date: Sat, 20 Jan 2007 00:05:01 +0800 From: "Aubrey Li" Subject: Re: [RPC][PATCH 2.6.20-rc5] limit total vfs page cache In-Reply-To: <45B0DB45.4070004@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <6d6a94c50701171923g48c8652ayd281a10d1cb5dd95@mail.gmail.com> <45B0DB45.4070004@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Vaidyanathan Srinivasan Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Andrew Morton , Nick Piggin , "linux-os (Dick Johnson)" , Robin Getz List-ID: On 1/19/07, Vaidyanathan Srinivasan wrote: > > > Hi Aubrey, > > The idea of creating separate flag for pagecache in page_alloc is > interesting. The good part is that you flag watermark low and the > zone reclaimer will do the rest of the job. > > However when the zone reclaimer starts to reclaim pages, it will > remove all cold pages and not specifically pagecache pages. This > may affect performance of applications. > > One possible solution to this reclaim is to use scan control fields > and ask the shrink_page_list() and shrink_active_list() routines to > target only pagecache pages. Pagecache pages are not mapped and > they are easy to find on the LRU list. > > Please review my patch at http://lkml.org/lkml/2007/01/17/96 > So you mean the existing reclaimer has the same issue, doesn't it? In your and Roy's patch, balance_pagecache() routine is called on file backed access. So you still want to add this checking? or change the current reclaimer completely? -Aubrey -- 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