Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750785AbWJRKKf (ORCPT ); Wed, 18 Oct 2006 06:10:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751456AbWJRKKf (ORCPT ); Wed, 18 Oct 2006 06:10:35 -0400 Received: from omx1-ext.sgi.com ([192.48.179.11]:27575 "EHLO omx1.americas.sgi.com") by vger.kernel.org with ESMTP id S1750785AbWJRKKe (ORCPT ); Wed, 18 Oct 2006 06:10:34 -0400 Date: Wed, 18 Oct 2006 03:10:21 -0700 From: Paul Jackson To: Robin Holt Cc: suresh.b.siddha@intel.com, dino@in.ibm.com, menage@google.com, Simon.Derr@bull.net, linux-kernel@vger.kernel.org, mbligh@google.com, rohitseth@google.com, dipankar@in.ibm.com, nickpiggin@yahoo.com.au Subject: Re: exclusive cpusets broken with cpu hotplug Message-Id: <20061018031021.9920552e.pj@sgi.com> In-Reply-To: <20061018095621.GB15877@lnx-holt.americas.sgi.com> References: <20061017192547.B19901@unix-os.sc.intel.com> <20061018001424.0c22a64b.pj@sgi.com> <20061018095621.GB15877@lnx-holt.americas.sgi.com> 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: 1332 Lines: 31 Robin wrote: > Could this be as simple as a CPU_UP_PREPARE or CPU_DOWN_PREPARE > removing all the cpu_exclusive cpusets and a CPU_UP_CANCELLED, > CPU_DOWN_CANCELLED, CPU_ONLINE, CPU_DEAD going through and > partitioning all the cpu_exclusive cpusets. Perhaps. The somewhat related problems, in my book, are: 1) I don't know how to tell what sched domains/groups a system has, nor how to tell my customers how to see what sched domains they have, and 2) I suspect that Mr. Cpusets doesn't understand sched domains and that Mr. Sched Domain doesn't understand cpusets, and that we've ended up with some inscrutable and likely unsuitable interactions between the two as a result, which in particular don't result in cpusets driving the sched domain configuration in the desired ways for some of the less trivial configs. Well ... at least the first suspcicion above is a near certainty ;). -- 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/