From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761910AbZEGPIF (ORCPT ); Thu, 7 May 2009 11:08:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754304AbZEGPHw (ORCPT ); Thu, 7 May 2009 11:07:52 -0400 Received: from mx2.redhat.com ([66.187.237.31]:59788 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754299AbZEGPHw (ORCPT ); Thu, 7 May 2009 11:07:52 -0400 Message-ID: <4A02F8ED.3090008@redhat.com> Date: Thu, 07 May 2009 11:06:21 -0400 From: Rik van Riel User-Agent: Thunderbird 2.0.0.21 (X11/20090320) MIME-Version: 1.0 To: Christoph Lameter CC: Peter Zijlstra , Wu Fengguang , Andrew Morton , "linux-kernel@vger.kernel.org" , "tytso@mit.edu" , "linux-mm@kvack.org" , Elladan , Nick Piggin , Johannes Weiner , KOSAKI Motohiro Subject: Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen References: <20090430072057.GA4663@eskimo.com> <20090430174536.d0f438dd.akpm@linux-foundation.org> <20090430205936.0f8b29fc@riellaptop.surriel.com> <20090430181340.6f07421d.akpm@linux-foundation.org> <20090430215034.4748e615@riellaptop.surriel.com> <20090430195439.e02edc26.akpm@linux-foundation.org> <49FB01C1.6050204@redhat.com> <20090501123541.7983a8ae.akpm@linux-foundation.org> <20090503031539.GC5702@localhost> <1241432635.7620.4732.camel@twins> <20090507121101.GB20934@localhost> <1241705702.11251.156.camel@twins> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Christoph Lameter wrote: > On Thu, 7 May 2009, Peter Zijlstra wrote: > > >> It re-instates the young bit for PROT_EXEC pages, so that they will only >> be paged when they are really cold, or there is severe pressure. >> > > But they are rescanned until then. Really cold means what exactly? I do a > back up of a few hundred gigabytes and do not use firefox while the backup > is ongoing. Will the firefox pages still be in memory or not? > The patch with the subject "[PATCH] vmscan: evict use-once pages first (v3)" together with this patch should make sure that it stays in memory. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with SMTP id D35C56B004D for ; Thu, 7 May 2009 11:06:45 -0400 (EDT) Message-ID: <4A02F8ED.3090008@redhat.com> Date: Thu, 07 May 2009 11:06:21 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen References: <20090430072057.GA4663@eskimo.com> <20090430174536.d0f438dd.akpm@linux-foundation.org> <20090430205936.0f8b29fc@riellaptop.surriel.com> <20090430181340.6f07421d.akpm@linux-foundation.org> <20090430215034.4748e615@riellaptop.surriel.com> <20090430195439.e02edc26.akpm@linux-foundation.org> <49FB01C1.6050204@redhat.com> <20090501123541.7983a8ae.akpm@linux-foundation.org> <20090503031539.GC5702@localhost> <1241432635.7620.4732.camel@twins> <20090507121101.GB20934@localhost> <1241705702.11251.156.camel@twins> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: Peter Zijlstra , Wu Fengguang , Andrew Morton , "linux-kernel@vger.kernel.org" , "tytso@mit.edu" , "linux-mm@kvack.org" , Elladan , Nick Piggin , Johannes Weiner , KOSAKI Motohiro List-ID: Christoph Lameter wrote: > On Thu, 7 May 2009, Peter Zijlstra wrote: > > >> It re-instates the young bit for PROT_EXEC pages, so that they will only >> be paged when they are really cold, or there is severe pressure. >> > > But they are rescanned until then. Really cold means what exactly? I do a > back up of a few hundred gigabytes and do not use firefox while the backup > is ongoing. Will the firefox pages still be in memory or not? > The patch with the subject "[PATCH] vmscan: evict use-once pages first (v3)" together with this patch should make sure that it stays in memory. -- 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