Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751619AbWJWGmQ (ORCPT ); Mon, 23 Oct 2006 02:42:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751618AbWJWGmQ (ORCPT ); Mon, 23 Oct 2006 02:42:16 -0400 Received: from omx2-ext.sgi.com ([192.48.171.19]:64970 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S1751613AbWJWGmP (ORCPT ); Mon, 23 Oct 2006 02:42:15 -0400 Date: Sun, 22 Oct 2006 23:41:52 -0700 From: Paul Jackson To: Nick Piggin Cc: dino@in.ibm.com, akpm@osdl.org, mbligh@google.com, menage@google.com, Simon.Derr@bull.net, linux-kernel@vger.kernel.org, rohitseth@google.com, holt@sgi.com, dipankar@in.ibm.com, suresh.b.siddha@intel.com Subject: Re: [RFC] cpuset: add interface to isolated cpus Message-Id: <20061022234152.baaf4624.pj@sgi.com> In-Reply-To: <453C5E77.2050905@yahoo.com.au> References: <20061019092607.17547.68979.sendpatchset@sam.engr.sgi.com> <20061020210422.GA29870@in.ibm.com> <20061022201824.267525c9.pj@sgi.com> <453C4E22.9000308@yahoo.com.au> <20061022225108.21716614.pj@sgi.com> <453C5E77.2050905@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: 1144 Lines: 28 Nick wrote: > These are both part of the same larger solution, which is to > partition domains. isolated CPUs are just the case of 1 CPU in > its own domain (and that's how they are implemented now). and later, he also wrote: > I think this is much more of an automatic behind your back thing. I got confused there. I agree that if we can do a -good- job of it, then an implicit, automatic solution is better for the problem of reducing sched domain partition sizes on large systems than yet another manual knob. But I thought that it was good idea, with general agreement, to provide an explicit control of isolated cpus for the real-time folks, even if under the covers it use sched domain partitions of size 1 to implement it. -- 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/