From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755473Ab0CHQcU (ORCPT ); Mon, 8 Mar 2010 11:32:20 -0500 Received: from casper.infradead.org ([85.118.1.10]:42274 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755206Ab0CHQcO (ORCPT ); Mon, 8 Mar 2010 11:32:14 -0500 Date: Mon, 8 Mar 2010 08:32:04 -0800 From: Arjan van de Ven To: Tejun Heo Cc: linux-kernel@vger.kernel.org, rusty@rustcorp.com.au, sivanich@sgi.com, heiko.carstens@de.ibm.com, torvalds@linux-foundation.org, mingo@elte.hu, peterz@infradead.org, dipankar@in.ibm.com, josh@freedesktop.org, paulmck@linux.vnet.ibm.com, oleg@redhat.com, akpm@linux-foundation.org, Tejun Heo Subject: Re: [PATCH 2/4] stop_machine: reimplement using cpuhog Message-ID: <20100308083204.1300b97a@infradead.org> In-Reply-To: <1268063603-7425-3-git-send-email-tj@kernel.org> References: <1268063603-7425-1-git-send-email-tj@kernel.org> <1268063603-7425-3-git-send-email-tj@kernel.org> Organization: Intel X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i586-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 9 Mar 2010 00:53:21 +0900 Tejun Heo wrote: > Reimplement stop_machine using cpuhog. As cpuhogs are guaranteed to > be available for all online cpus, stop_machine_create/destroy() are no > longer necessary and removed. question; stop_machine pretty much also stops interrupts (it has to, at least for the users of stop_machine).. do cpu_hogs do this too? (if they don't, cpu_hogs aren't safe for some of the users of stop_machine, like code patching etc) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org