From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932496AbXAGLAW (ORCPT ); Sun, 7 Jan 2007 06:00:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932495AbXAGLAW (ORCPT ); Sun, 7 Jan 2007 06:00:22 -0500 Received: from e36.co.us.ibm.com ([32.97.110.154]:33129 "EHLO e36.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932496AbXAGLAV (ORCPT ); Sun, 7 Jan 2007 06:00:21 -0500 Date: Sun, 7 Jan 2007 16:30:13 +0530 From: Srivatsa Vaddagiri To: Andrew Morton Cc: Oleg Nesterov , David Howells , Christoph Hellwig , Ingo Molnar , Linus Torvalds , linux-kernel@vger.kernel.org, Gautham shenoy Subject: Re: [PATCH] fix-flush_workqueue-vs-cpu_dead-race-update Message-ID: <20070107110013.GD13579@in.ibm.com> Reply-To: vatsa@in.ibm.com References: <20061218162701.a3b5bfda.akpm@osdl.org> <20061219004319.GA821@tv-sign.ru> <20070104113214.GA30377@in.ibm.com> <20070104142936.GA179@tv-sign.ru> <20070104091850.c1feee76.akpm@osdl.org> <20070106151036.GA951@tv-sign.ru> <20070106154506.GC24274@in.ibm.com> <20070106163035.GA2948@tv-sign.ru> <20070106163851.GA13579@in.ibm.com> <20070106111117.54bb2307.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070106111117.54bb2307.akpm@osdl.org> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 06, 2007 at 11:11:17AM -0800, Andrew Morton wrote: > Has anyone thought seriously about using the process freezer in the > cpu-down/cpu-up paths? That way we don't need to lock anything anywhere? How would this provide a stable access to cpu_online_map in functions that need to block while accessing it (as flush_workqueue requires)? -- Regards, vatsa