Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751779AbXAQICW (ORCPT ); Wed, 17 Jan 2007 03:02:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751792AbXAQICV (ORCPT ); Wed, 17 Jan 2007 03:02:21 -0500 Received: from omx2-ext.sgi.com ([192.48.171.19]:35745 "EHLO omx2.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751779AbXAQICV (ORCPT ); Wed, 17 Jan 2007 03:02:21 -0500 Date: Wed, 17 Jan 2007 00:01:58 -0800 From: Paul Jackson To: Andrew Morton Cc: clameter@sgi.com, menage@google.com, linux-kernel@vger.kernel.org, nickpiggin@yahoo.com.au, linux-mm@kvack.org, ak@suse.de, dgc@sgi.com Subject: Re: [RFC 0/8] Cpuset aware writeback Message-Id: <20070117000158.a2e7016e.pj@sgi.com> In-Reply-To: <20070116230034.b8cb4263.akpm@osdl.org> References: <20070116054743.15358.77287.sendpatchset@schroedinger.engr.sgi.com> <20070116135325.3441f62b.akpm@osdl.org> <20070116154054.e655f75c.akpm@osdl.org> <20070116170734.947264f2.akpm@osdl.org> <20070116183406.ed777440.akpm@osdl.org> <20070116200506.d19eacf5.akpm@osdl.org> <20070116230034.b8cb4263.akpm@osdl.org> Organization: SGI X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.3; 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 Content-Length: 990 Lines: 24 Andrew wrote: > - consider going off-cpuset for critical allocations. We do ... in mm/page_alloc.c: * This is the last chance, in general, before the goto nopage. * Ignore cpuset if GFP_ATOMIC (!wait) rather than fail alloc. * See also cpuset_zone_allowed() comment in kernel/cpuset.c. */ page = get_page_from_freelist(gfp_mask, order, zonelist, alloc_flags); We also allow GFP_KERNEL requests to escape the current cpuset, to the nearest enclosing mem_exclusive cpuset, which is typically a big cpuset covering most of the system. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401 - 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/