From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030391AbWBHFOL (ORCPT ); Wed, 8 Feb 2006 00:14:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030390AbWBHFOL (ORCPT ); Wed, 8 Feb 2006 00:14:11 -0500 Received: from omx1-ext.sgi.com ([192.48.179.11]:25544 "EHLO omx1.americas.sgi.com") by vger.kernel.org with ESMTP id S1030389AbWBHFOJ (ORCPT ); Wed, 8 Feb 2006 00:14:09 -0500 Date: Tue, 7 Feb 2006 21:13:58 -0800 From: Paul Jackson To: Con Kolivas Cc: nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@osdl.org, ck@vds.kolivas.org Subject: Re: [PATCH] mm: implement swap prefetching Message-Id: <20060207211358.8b970343.pj@sgi.com> In-Reply-To: <200602081606.19656.kernel@kolivas.org> References: <200602071028.30721.kernel@kolivas.org> <200602071502.41456.kernel@kolivas.org> <20060207204655.f1c69875.pj@sgi.com> <200602081606.19656.kernel@kolivas.org> Organization: SGI X-Mailer: Sylpheed version 2.1.7 (GTK+ 2.4.9; i686-pc-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 Con wrote: > > If you don't do that, then consider disabling this thing entirely > > if CONFIG_NUMA is enabled. This swap prefetching sounds like it > > could be a loose canon ball in a NUMA box. > > That's probably a less satisfactory option since NUMA isn't that rare with the > light numa of commodity hardware. You're right -- my suggestion was not a good one. I expect that the main distros are or will be shipping their stock PC kernel with NUMA enabled. Most of these kernels end up on exactly the kind of system that is the target audience for swap prefetching. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401 From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 7 Feb 2006 21:13:58 -0800 From: Paul Jackson Subject: Re: [PATCH] mm: implement swap prefetching Message-Id: <20060207211358.8b970343.pj@sgi.com> In-Reply-To: <200602081606.19656.kernel@kolivas.org> References: <200602071028.30721.kernel@kolivas.org> <200602071502.41456.kernel@kolivas.org> <20060207204655.f1c69875.pj@sgi.com> <200602081606.19656.kernel@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Con Kolivas Cc: nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@osdl.org, ck@vds.kolivas.org List-ID: Con wrote: > > If you don't do that, then consider disabling this thing entirely > > if CONFIG_NUMA is enabled. This swap prefetching sounds like it > > could be a loose canon ball in a NUMA box. > > That's probably a less satisfactory option since NUMA isn't that rare with the > light numa of commodity hardware. You're right -- my suggestion was not a good one. I expect that the main distros are or will be shipping their stock PC kernel with NUMA enabled. Most of these kernels end up on exactly the kind of system that is the target audience for swap prefetching. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org