From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <460115D9.7030806@redhat.com> Date: Wed, 21 Mar 2007 07:24:09 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [RFC][PATCH] split file and anonymous page queues #3 References: <46005B4A.6050307@redhat.com> <17920.61568.770999.626623@gargle.gargle.HOWL> In-Reply-To: <17920.61568.770999.626623@gargle.gargle.HOWL> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Nikita Danilov Cc: Linux Kernel Mailing List , linux-mm List-ID: Nikita Danilov wrote: > Rik van Riel writes: > > [ OK, I suck. I edited yesterday's email with the new info, but forgot > > to change the attachment to today's patch. Here is today's patch. ] > > > > Split the anonymous and file backed pages out onto their own pageout > > queues. This we do not unnecessarily churn through lots of anonymous > > pages when we do not want to swap them out anyway. > > Won't this re-introduce problems similar to ones due to split > inactive_clean/inactive_dirty queues we had in the past? > > For example, by rotating anon queues faster than file queues, kernel > would end up reclaiming anon pages that are hotter (in "absolute" LRU > order) than some file pages. That is why we check the fraction of referenced pages in each queue. Please look at the get_scan_ratio() and shrink_zone() code in my patch. -- Politics is the struggle between those who want to make their country the best in the world, and those who believe it already is. Each group calls the other unpatriotic. -- 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