Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261608AbVBODSH (ORCPT ); Mon, 14 Feb 2005 22:18:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261609AbVBODSH (ORCPT ); Mon, 14 Feb 2005 22:18:07 -0500 Received: from fire.osdl.org ([65.172.181.4]:15029 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S261608AbVBODSD (ORCPT ); Mon, 14 Feb 2005 22:18:03 -0500 Date: Mon, 14 Feb 2005 19:17:35 -0800 From: Andrew Morton To: Andrea Arcangeli Cc: hugh@veritas.com, iwamoto@valinux.co.jp, linux-kernel@vger.kernel.org, lhms-devel@lists.sourceforge.net Subject: Re: [RFC] Changing COW detection to be memory hotplug friendly Message-Id: <20050214191735.6330ce1f.akpm@osdl.org> In-Reply-To: <20050214214148.GM13712@opteron.random> References: <20050210190521.GN18573@opteron.random> <20050210204025.GS18573@opteron.random> <20050211085239.GD18573@opteron.random> <20050214174158.GE13712@opteron.random> <20050214214148.GM13712@opteron.random> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 753 Lines: 16 Andrea Arcangeli wrote: > > you're right something might be different now > that we don't follow a swapout virtual address space order anymore There's a patch in -mm which attempts to do so, and afair, succeeds. However the performance seems to be crappy. Its main benefit at present is in reducing worst-case scheduling latencies (scan_swap_map). ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.11-rc3/2.6.11-rc3-mm2/broken-out/swapspace-layout-improvements-fix.patch - 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/