From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 4E34F6B01BA for ; Fri, 2 Jul 2010 02:36:23 -0400 (EDT) Received: from m2.gw.fujitsu.co.jp ([10.0.50.72]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o626aKBp005100 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Fri, 2 Jul 2010 15:36:20 +0900 Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 5471B45DE61 for ; Fri, 2 Jul 2010 15:36:20 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 326C445DE51 for ; Fri, 2 Jul 2010 15:36:20 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 1A62C1DB803C for ; Fri, 2 Jul 2010 15:36:20 +0900 (JST) Received: from m108.s.css.fujitsu.com (m108.s.css.fujitsu.com [10.249.87.108]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id B5CE01DB803E for ; Fri, 2 Jul 2010 15:36:19 +0900 (JST) Date: Fri, 2 Jul 2010 15:31:43 +0900 From: KAMEZAWA Hiroyuki 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> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org 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 List-ID: 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, 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