Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757325AbXJCFWP (ORCPT ); Wed, 3 Oct 2007 01:22:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751514AbXJCFWB (ORCPT ); Wed, 3 Oct 2007 01:22:01 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:45530 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751438AbXJCFWA (ORCPT ); Wed, 3 Oct 2007 01:22:00 -0400 Date: Tue, 2 Oct 2007 22:21:58 -0700 From: Paul Jackson To: Nick Piggin Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: wibbling over the cpuset shed domain connnection Message-Id: <20071002222158.1a083348.pj@sgi.com> In-Reply-To: <200710022236.59583.nickpiggin@yahoo.com.au> References: <20071001142222.fcaa8d57.akpm@linux-foundation.org> <20071001143443.b873f70d.pj@sgi.com> <200710022236.59583.nickpiggin@yahoo.com.au> 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: 1691 Lines: 35 > In the meantime, that patch should be merged though, shouldn't it? Which patch do you refer to: 1) the year old patch to disconnect cpusets and sched domains: cpuset-remove-sched-domain-hooks-from-cpusets.patch 2) my patch of a few days ago to add a 'sched_load_balance' flag: cpuset and sched domains: sched_load_balance flag I can't push one without the other, because some real time folks are depending on the sched domain hooks that (1) would remove, so need some alternative, such as in (2). Even though (1) is rather broken, as you note, it still provides a way that the real time folks can disable load balancing at runtime on selected CPUs, so is essential to their work. I can't delay any more resolving this, because the cgroup (aka container) code is tangled up with (1), and Andrew needs a clear path to send cgroups to Linus real soon now. In my last message to you, a couple of days ago, I asked what I thought were a couple of key and simple questions -- can sched domains overlap, and what does it mean for user space if they overlap? A further question comes to mind now -- if sched domains can overlap, does this provide some capability to user space that is important to provide? Could you take a minute, Nick, to consider these questions? Thanks. -- 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/