Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756636AbZFWV40 (ORCPT ); Tue, 23 Jun 2009 17:56:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757922AbZFWV4E (ORCPT ); Tue, 23 Jun 2009 17:56:04 -0400 Received: from mx2.redhat.com ([66.187.237.31]:60292 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757586AbZFWV4D (ORCPT ); Tue, 23 Jun 2009 17:56:03 -0400 Message-ID: <4A414F55.2040808@redhat.com> Date: Tue, 23 Jun 2009 17:55:33 -0400 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Thunderbird 2.0.0.17 (X11/20080915) MIME-Version: 1.0 To: akataria@vmware.com CC: KAMEZAWA Hiroyuki , KOSAKI Motohiro , LKML , Lee Schermerhorn , Dave Hansen , Mel Gorman , "linux-mm@kvack.org" 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1094 Lines: 28 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/