Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934063Ab0HFATL (ORCPT ); Thu, 5 Aug 2010 20:19:11 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:60820 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932426Ab0HFATI (ORCPT ); Thu, 5 Aug 2010 20:19:08 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: Michael Rubin Subject: Re: [PATCH 2/2] writeback: Adding pages_dirtied and pages_entered_writeback Cc: kosaki.motohiro@jp.fujitsu.com, Andrew Morton , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, jack@suse.cz, david@fromorbit.com, hch@lst.de, axboe@kernel.dk In-Reply-To: References: <20100806084928.31DE.A69D9226@jp.fujitsu.com> Message-Id: <20100806091548.31ED.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Fri, 6 Aug 2010 09:18:59 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 926 Lines: 25 > On Thu, Aug 5, 2010 at 4:56 PM, KOSAKI Motohiro > wrote: > > /proc/vmstat already have both. > > > > cat /proc/vmstat |grep nr_dirty > > cat /proc/vmstat |grep nr_writeback > > > > Also, /sys/devices/system/node/node0/meminfo show per-node stat. > > > > Perhaps, I'm missing your point. > > These only show the number of dirty pages present in the system at the > point they are queried. > The counter I am trying to add are increasing over time. They allow > developers to see rates of pages being dirtied and entering writeback. > Which is very helpful. Usually administrators get the data two times and subtract them. Isn't it sufficient? -- 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/