From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 462FB6B00A3 for ; Thu, 16 Jul 2009 12:25:03 -0400 (EDT) Message-ID: <4A5F5454.8070300@redhat.com> Date: Thu, 16 Jul 2009 12:24:52 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH] mm: count only reclaimable lru pages References: <20090716133454.GA20550@localhost> <4987.1247760908@redhat.com> In-Reply-To: <4987.1247760908@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: David Howells Cc: Wu Fengguang , KOSAKI Motohiro , Minchan Kim , Johannes Weiner , Andrew Morton , LKML , Christoph Lameter , "peterz@infradead.org" , "tytso@mit.edu" , "linux-mm@kvack.org" , "elladan@eskimo.com" , "npiggin@suse.de" , "Barnes, Jesse" List-ID: David Howells wrote: > Wu Fengguang wrote: > >> It can greatly (and correctly) increase the slab scan rate under high memory >> pressure (when most file pages have been reclaimed and swap is full/absent), >> thus avoid possible false OOM kills. > > I applied this to my test machine's kernel and rebooted. It hit the OOM > killer a few seconds after starting msgctl11 . Furthermore, it was not then > responsive to SysRq+b or anything else and had to have the magic button > pushed. It's part of a series of patches, including the three posted by Kosaki-san last night (to track the number of isolated pages) and the patch I posted last night (to throttle reclaim when too many pages are isolated). -- 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