From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750807AbWFUDyd (ORCPT ); Tue, 20 Jun 2006 23:54:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750813AbWFUDyd (ORCPT ); Tue, 20 Jun 2006 23:54:33 -0400 Received: from smtp.osdl.org ([65.172.181.4]:47551 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1750807AbWFUDyd (ORCPT ); Tue, 20 Jun 2006 23:54:33 -0400 Date: Tue, 20 Jun 2006 20:54:15 -0700 From: Andrew Morton To: Mark Lord Cc: js@linuxtv.org, pavel@ucw.cz, p.lundkvist@telia.com, linux-kernel@vger.kernel.org, rjw@sisk.pl Subject: Re: [PATCH] Page writeback broken after resume: wb_timer lost Message-Id: <20060620205415.d808ace9.akpm@osdl.org> In-Reply-To: <4498BF51.5090204@rtr.ca> References: <20060520130326.GA6092@localhost> <20060520103728.6f3b3798.akpm@osdl.org> <20060520225018.GC8490@elf.ucw.cz> <20060520171244.4399bc54.akpm@osdl.org> <20060616212410.GA6821@linuxtv.org> <4496C5AC.3030809@rtr.ca> <4498BF51.5090204@rtr.ca> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.17; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 20 Jun 2006 23:38:57 -0400 Mark Lord wrote: > > I just gave it a try here. With or without a suspend/resume cycle after > > boot, > > the "sync" time is much quicker. But the Dirty count in /proc/meminfo > > still shows very huge (eg. 600MB) values that never really get smaller > > until I type "sync". But that subsequent "sync" only takes a couple > > of seconds now, rather than 10-20 seconds like before. > .. > > Yup, behaviour is *definitely* much better now. I'm not sure why > the /proc/meminfo "Dirty" count lags behind reality, but the disk > is being kept much more up-to-date than without this patch. Are you able to come up with a foolproof set of steps which would allow the laggy-dirtiness to be reproduced by yours truly?