Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261850AbVANWx1 (ORCPT ); Fri, 14 Jan 2005 17:53:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261888AbVANWw7 (ORCPT ); Fri, 14 Jan 2005 17:52:59 -0500 Received: from orb.pobox.com ([207.8.226.5]:37292 "EHLO orb.pobox.com") by vger.kernel.org with ESMTP id S261850AbVANWwk (ORCPT ); Fri, 14 Jan 2005 17:52:40 -0500 Date: Fri, 14 Jan 2005 14:52:13 -0800 From: "Barry K. Nathan" To: Tim Schmielau Cc: Andrew Morton , lkml Subject: Re: swapspace layout improvements advocacy Message-ID: <20050114225213.GA4841@ip68-4-98-123.oc.oc.cox.net> References: <20050112123524.GA12843@lnx-holt.americas.sgi.com> <20050112105315.2ac21173.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 829 Lines: 20 On Fri, Jan 14, 2005 at 02:55:27PM +0100, Tim Schmielau wrote: > 2.6 seems in due need of such a patch. > > I recently found out that 2.6 kernels degrade horribly when going into > swap. On my dual PIII-850 with as little as 256 mb ram, I can easily [snip] I haven't tried the patch in question (unless it's in any Fedora kernels), but I've noticed that the single biggest step to improve swapping performance in 2.6 is to use the CFQ scheduler, not the AS scheduler. (That's also why Red Hat/Fedora kernels use CFQ as the default scheduler.) -Barry K. Nathan - 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/