Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756606Ab0GBGgX (ORCPT ); Fri, 2 Jul 2010 02:36:23 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:47164 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754023Ab0GBGgV (ORCPT ); Fri, 2 Jul 2010 02:36:21 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Date: Fri, 2 Jul 2010 15:31:43 +0900 From: KAMEZAWA Hiroyuki To: KAMEZAWA Hiroyuki Cc: Mel Gorman , Christoph Hellwig , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Chris Mason , Nick Piggin , Rik van Riel , Johannes Weiner , KOSAKI Motohiro , Andrew Morton , Andrea Arcangeli Subject: Re: [PATCH 14/14] fs,xfs: Allow kswapd to writeback pages Message-Id: <20100702153143.44c5fec8.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20100702152643.36019b4e.kamezawa.hiroyu@jp.fujitsu.com> References: <1277811288-5195-1-git-send-email-mel@csn.ul.ie> <1277811288-5195-15-git-send-email-mel@csn.ul.ie> <20100629123722.GA725@infradead.org> <20100629125143.GB31561@csn.ul.ie> <20100630091411.49f92cff.kamezawa.hiroyu@jp.fujitsu.com> <20100701103032.GG31741@csn.ul.ie> <20100702152643.36019b4e.kamezawa.hiroyu@jp.fujitsu.com> Organization: FUJITSU Co. LTD. X-Mailer: Sylpheed 3.0.2 (GTK+ 2.10.14; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 861 Lines: 21 On Fri, 2 Jul 2010 15:26:43 +0900 KAMEZAWA Hiroyuki wrote: > > I see the direction you are thinking of but I have big concerns about clean > > pages getting delayed for too long on the LRU_CLEANING pages before kswapd > > puts them back in the right place. I think a safer direction would be for > > memcg people to investigate Andrea's "switch stack" suggestion. > > > Hmm, I may have to consider that. My concern is that IRQ's switch-stack works > well just because no-task-switch in IRQ routine. (I'm sorry if I misunderstand.) > Ok, I'll think about this 1st. Thanks, -Kame -- 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/