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 A7A9160020C for ; Thu, 5 Aug 2010 11:20:05 -0400 (EDT) Message-ID: <4C5AD686.9040503@redhat.com> Date: Thu, 05 Aug 2010 11:19:34 -0400 From: Rik van Riel MIME-Version: 1.0 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: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: LKML , linux-mm , Andrew Morton , Johannes Weiner , Mel Gorman , Wu Fengguang , Minchan Kim List-ID: 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, 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