Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932832AbYGQTmx (ORCPT ); Thu, 17 Jul 2008 15:42:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757323AbYGQTmm (ORCPT ); Thu, 17 Jul 2008 15:42:42 -0400 Received: from sinclair.provo.novell.com ([137.65.248.137]:49160 "EHLO sinclair.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754916AbYGQTml convert rfc822-to-8bit (ORCPT ); Thu, 17 Jul 2008 15:42:41 -0400 Message-Id: <487F6972.BA47.005A.0@novell.com> X-Mailer: Novell GroupWise Internet Agent 7.0.3 Date: Thu, 17 Jul 2008 13:46:58 -0600 From: "Gregory Haskins" To: "Max Krasnyansky" Cc: , , , , , Subject: Re: [PATCH] cpu hotplug, sched: Introduce cpu_active_map and redoscheddomainmanagment (take 2) References: <1216122229-4865-1-git-send-email-maxk@qualcomm.com> <487DAD86.BA47.005A.0@novell.com> <487E6BD7.3020006@qualcomm.com> <487E7B6C.BA47.005A.0@novell.com> <487EF1E9.2040101@qualcomm.com> <487EFB71.BA47.005A.0@novell.com> <487F9509.9050802@qualcomm.com> In-Reply-To: <487F9509.9050802@qualcomm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1218 Lines: 34 >>> On Thu, Jul 17, 2008 at 2:52 PM, in message <487F9509.9050802@qualcomm.com>, Max Krasnyansky wrote: > Gregory Haskins wrote: >> >> Hi Max, >> Thanks for the pointers. I see that I did indeed misunderstand the intent >> of the patch. It seems you already solved the rebuild problem, and were >> just trying to solve the "migrate to a dead cpu" problem that Linus mentions >> as a solution with cpu_active_map. > > Yes. btw they are definitely related, because the reason we were blowing > away the domains is to avoid "migration to a dead cpu". ie We were relying > on the fact that domain masks never contain cpus that are either dying or > already dead. Agreed. >> >> Thoughts? > > None at this point :). I need to run right now and will try to look at this > later today. My knowledge of the internal sched structs is definitely > lacking so I need to look at the rq->rd thing to have and opinion. Sounds good, Max. Thanks! -Greg -- 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/