From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 25 Sep 2001 16:41:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 25 Sep 2001 16:41:44 -0400 Received: from 50dyn47.com21.casema.net ([213.17.31.47]:7808 "HELO spaans.ds9a.nl") by vger.kernel.org with SMTP id ; Tue, 25 Sep 2001 16:41:36 -0400 Date: Tue, 25 Sep 2001 22:42:04 +0200 From: Jasper Spaans To: Rik van Riel Cc: Pau Aliagas , lkml , Alan Cox , Roberto Orenstein , Francois Romieu Subject: Re: [PATCH] Re: 2.4.9-ac15 painfully sluggish Message-ID: <20010925224204.A5968@spaans.ds9a.nl> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.22i Organization: http://www.insultant.nl/ X-Copyright: Copyright 2001 C. Jasper Spaans - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 25, 2001 at 04:32:13PM -0300, Rik van Riel wrote: > > The problem seems to be related in pages not moved to swap but > > being discarded somehow and reread later on.... just a guess. > > I've made a small patch to 2.4.9-ac15 which should make > page_launder() smoother, make some (very minor) tweaks > to page aging and updates various comments in vmscan.c > > It's below this email and at: [snip] With this -painfully applied- patch, all seems a lot better. However, it still seems more sluggish than 2.4.9-ac12. Haven't bothered testing -ac13 and -ac14. Swapping still seems to be a problem though, as this kernel happily claims several tens of MBs of swap, and then, out of the blue, starts writing pages out in huge blocks. The vmstat info just disappeared from my screen, while stressing the vm-system by doing a large parallel build, however, it showed no paging happening during long times (20-30 secs) and then suddenly writing 30 MB in one go. Doesn't seem very smooth to me, where can I get my refund? :) (if you'd like more details, please ask, I can do some testing) Regards, -- Q_. Jasper Spaans `~\ http://jsp.ds9a.nl/ Mr /\ Tel/Fax: +31-84-8749842 Zap Move '.sig' for great justice!