From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754638Ab0JRJKI (ORCPT ); Mon, 18 Oct 2010 05:10:08 -0400 Received: from fgwmail7.fujitsu.co.jp ([192.51.44.37]:60777 "EHLO fgwmail7.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751451Ab0JRJKG (ORCPT ); Mon, 18 Oct 2010 05:10:06 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: "Figo.zhang" Subject: Re: oom_killer crash linux system Cc: kosaki.motohiro@jp.fujitsu.com, Wu Fengguang , KAMEZAWA Hiroyuki , "linux-kernel@vger.kernel.org" , "rientjes@google.com" , figo1802 In-Reply-To: <1287389631.1997.9.camel@myhost> References: <20101018021126.GB8654@localhost> <1287389631.1997.9.camel@myhost> Message-Id: <20101018180919.3AF8.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Mon, 18 Oct 2010 18:10:00 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > i want to test the oom-killer. My desktop (Dell optiplex 780, i686 > kernel)have 2GB ram, i turn off the swap partition, and open a huge pdf > files and applications, and let the system eat huge ram. > > in 2.6.35, i can use ram up to 1.75GB, > > but in 2.6.36-rc8, i just use to 1.53GB ram , the system come very slow > and crashed after some minutes , the DiskIO is very busy. i see the > DiskIO read is up to 8MB/s, write just only 400KB/s, (see by conky). > > what change between 2.6.35 to 2.6.36-rc8? is it low performance about > page reclaim and page writeback in high press ram useage? very lots of change ;) can you please send us your crash log?