From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754104AbYCBKgU (ORCPT ); Sun, 2 Mar 2008 05:36:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752348AbYCBKgE (ORCPT ); Sun, 2 Mar 2008 05:36:04 -0500 Received: from fgwmail7.fujitsu.co.jp ([192.51.44.37]:45377 "EHLO fgwmail7.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752473AbYCBKgD (ORCPT ); Sun, 2 Mar 2008 05:36:03 -0500 Date: Sun, 02 Mar 2008 19:35:44 +0900 From: KOSAKI Motohiro To: Rik van Riel Subject: Re: [patch 11/21] (NEW) more aggressively use lumpy reclaim Cc: kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org, Lee Schermerhorn , linux-mm@kvack.org In-Reply-To: <20080228192928.954667833@redhat.com> References: <20080228192908.126720629@redhat.com> <20080228192928.954667833@redhat.com> Message-Id: <20080302193024.1E72.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.42 [ja] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi I think this patch is very good improvement. but it is not related to split lru. Why don't you separate this patch? IMHO treat as independent patch is better. Thanks. > During an AIM7 run on a 16GB system, fork started failing around > 32000 threads, despite the system having plenty of free swap and > 15GB of pageable memory. > > If normal pageout does not result in contiguous free pages for > kernel stacks, fall back to lumpy reclaim instead of failing fork > or doing excessive pageout IO. > > I do not know whether this change is needed due to the extreme > stress test or because the inactive list is a smaller fraction > of system memory on huge systems.