From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265812AbUHWRBW (ORCPT ); Mon, 23 Aug 2004 13:01:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265098AbUHWRBV (ORCPT ); Mon, 23 Aug 2004 13:01:21 -0400 Received: from ns.virtualhost.dk ([195.184.98.160]:43934 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S265812AbUHWRAw (ORCPT ); Mon, 23 Aug 2004 13:00:52 -0400 Date: Mon, 23 Aug 2004 19:00:45 +0200 From: Jens Axboe To: Karl Vogel Cc: Marcelo Tosatti , linux-kernel@vger.kernel.org Subject: Re: Kernel 2.6.8.1: swap storm of death - CFQ scheduler=culprit Message-ID: <20040823170044.GB24089@suse.de> References: <6DED3619289CD311BCEB00508B8E133601A68B13@nt-server2.antwerp.seagha.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6DED3619289CD311BCEB00508B8E133601A68B13@nt-server2.antwerp.seagha.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 23 2004, Karl Vogel wrote: > > > Jens, is this huge amount of bio/biovec's allocations > > expected with CFQ? Its really really bad. > > > > Nope, it's not by design :-) > > > > A test case would be nice, then I'll fix it as soon as possible. But > > please retest with 2.6.8.1 marcelo, 2.6.8-rc4 is missing an important > > fix to ll_rw_blk that can easily cause this. The first report is for > > 2.6.8.1, so I'm more puzzled on that. > > I tried with 2.6.8.1 and 2.6.8.1-mm4, both had the problem. If there > is anything extra I need to try/record, just shoot! > > Original post with testcase + stats: > http://article.gmane.org/gmane.linux.kernel/228156 Good report, I'll reproduce it here tomorrow. Thanks! -- Jens Axboe