From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id A9BE76B004F for ; Tue, 23 Jun 2009 17:54:22 -0400 (EDT) Message-ID: <4A414F55.2040808@redhat.com> Date: Tue, 23 Jun 2009 17:55:33 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH] Hugepages should be accounted as unevictable pages. References: <20090623093459.2204.A69D9226@jp.fujitsu.com> <1245732411.18339.6.camel@alok-dev1> <20090623135017.220D.A69D9226@jp.fujitsu.com> <20090623141147.8f2cef18.kamezawa.hiroyu@jp.fujitsu.com> <1245736441.18339.21.camel@alok-dev1> <4A41481D.1060607@redhat.com> <1245793331.24110.33.camel@alok-dev1> In-Reply-To: <1245793331.24110.33.camel@alok-dev1> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: akataria@vmware.com Cc: KAMEZAWA Hiroyuki , KOSAKI Motohiro , LKML , Lee Schermerhorn , Dave Hansen , Mel Gorman , "linux-mm@kvack.org" List-ID: Alok Kataria wrote: > On Tue, 2009-06-23 at 14:24 -0700, Rik van Riel wrote: >> I can see something reasonable on both sides of this >> particular debate. However, even with this patch the >> "unevictable" statistic does not reclaim the total >> number of pages that are unevictable pages from a >> zone, so I am not sure how it helps you achieve your >> goal. > > Yes but most of the other memory (page table and others) which is > unevictable is actually static in nature. IOW, the amount of this other > kind of kernel unevictable pages can be actually interpolated from the > amount of physical memory on the system. That would be a fair argument, if it were true. Things like page tables and dentry/inode caches vary according to the use case and are allocated as needed. They are in no way "static in nature". -- 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