Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752836AbXFDUVE (ORCPT ); Mon, 4 Jun 2007 16:21:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751447AbXFDUUy (ORCPT ); Mon, 4 Jun 2007 16:20:54 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:60533 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751377AbXFDUUy (ORCPT ); Mon, 4 Jun 2007 16:20:54 -0400 Date: Mon, 4 Jun 2007 22:20:39 +0200 From: Ingo Molnar To: Matt Mackall Cc: Rusty Russell , akpm@linux-foundation.org, Linux-kernel@vger.kernel.org Subject: Re: Interesting interaction between lguest and CFS Message-ID: <20070604202039.GA27149@elte.hu> References: <20070604173710.GR11166@waste.org> <20070604181151.GA1745@elte.hu> <20070604184224.GH11115@waste.org> <20070604191229.GA12444@elte.hu> <20070604192755.GI11115@waste.org> <20070604194038.GA15782@elte.hu> <20070604195951.GJ11115@waste.org> <20070604201300.GB21261@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070604201300.GB21261@elte.hu> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 943 Lines: 29 * Ingo Molnar wrote: > > I suggest you try this yourself [...] > > yep, i know how to use lguest and i'm already running it :) But i > cannot trigger the problem, that's why i was curious about your > host-side stats. i can run a hundred CPU hogs on the host and the lguest instance is still usable under CFS: @%@%> time ls bin home lost+found proc sys var dev lib mnt root tmp etc linuxrc opt sbin usr real 0m 0.33s user 0m 0.00s sys 0m 0.00s i'm wondering whether the delay goes away if you boot with maxcpus=1? (if you have multiple cpus/cores on your box) Ingo - 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/