From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Sep 2001 21:24:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Sep 2001 21:24:06 -0400 Received: from [195.223.140.107] ([195.223.140.107]:9207 "EHLO athlon.random") by vger.kernel.org with ESMTP id ; Thu, 20 Sep 2001 21:23:59 -0400 Date: Fri, 21 Sep 2001 03:22:30 +0200 From: Andrea Arcangeli To: Alan Cox Cc: Roger Larsson , Oliver Xymoron , Dieter =?iso-8859-1?Q?N=FCtzel?= , Stefan Westerfeld , Robert Love , linux-kernel , ReiserFS List Subject: Re: [PATCH] Preemption Latency Measurement Tool Message-ID: <20010921032230.Q729@athlon.random> In-Reply-To: <200109210047.f8L0lkv26045@maile.telia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ; from alan@lxorguk.ukuu.org.uk on Fri, Sep 21, 2001 at 02:03:37AM +0100 X-GnuPG-Key-URL: http://e-mind.com/~andrea/aa.gnupg.asc X-PGP-Key-URL: http://e-mind.com/~andrea/aa.asc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 21, 2001 at 02:03:37AM +0100, Alan Cox wrote: > they dont get stuck doing a huge amount of pageout work for someone else. > Thats one thing I seem to be seeing with the 10pre11 VM. actually one feature of the 10pre11 VM is that it will avoid a task to give to other people the pages that it is freeing for itself. The previous VM didn't has such a feature. So (in theory :) it should be the other way around. see the implementation of page_alloc.c::balance_classzone(). Actually Linus found just a few minutes ago a possible source for high latencies in the pre12 VM, my silly mistake, he will certainly fix it in pre13 somehow just in case that was the problem. Andrea