Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760720Ab0HEPUZ (ORCPT ); Thu, 5 Aug 2010 11:20:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52741 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756769Ab0HEPUX (ORCPT ); Thu, 5 Aug 2010 11:20:23 -0400 Message-ID: <4C5AD686.9040503@redhat.com> Date: Thu, 05 Aug 2010 11:19:34 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc12 Lightning/1.0b2pre Thunderbird/3.0.4 MIME-Version: 1.0 To: KOSAKI Motohiro CC: LKML , linux-mm , Andrew Morton , Johannes Weiner , Mel Gorman , Wu Fengguang , Minchan Kim Subject: Re: [PATCH 1/7] vmscan: raise the bar to PAGEOUT_IO_SYNC stalls References: <20100805150624.31B7.A69D9226@jp.fujitsu.com> <20100805151125.31BA.A69D9226@jp.fujitsu.com> In-Reply-To: <20100805151125.31BA.A69D9226@jp.fujitsu.com> 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: 937 Lines: 28 On 08/05/2010 02:12 AM, KOSAKI Motohiro wrote: > From: Wu Fengguang > > Fix "system goes unresponsive under memory pressure and lots of > dirty/writeback pages" bug. > > http://lkml.org/lkml/2010/4/4/86 > > In the above thread, Andreas Mohr described that > > Invoking any command locked up for minutes (note that I'm > talking about attempted additional I/O to the _other_, > _unaffected_ main system HDD - such as loading some shell > binaries -, NOT the external SSD18M!!). > > This happens when the two conditions are both meet: > - under memory pressure > - writing heavily to a slow device Acked-by: Rik van Riel -- 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/