Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756215AbXI1VSJ (ORCPT ); Fri, 28 Sep 2007 17:18:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752814AbXI1VR5 (ORCPT ); Fri, 28 Sep 2007 17:17:57 -0400 Received: from rtr.ca ([76.10.145.34]:4325 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752802AbXI1VR4 (ORCPT ); Fri, 28 Sep 2007 17:17:56 -0400 Message-ID: <46FD6F83.8070801@rtr.ca> Date: Fri, 28 Sep 2007 17:17:55 -0400 From: Mark Lord User-Agent: Thunderbird 2.0.0.6 (X11/20070728) MIME-Version: 1.0 To: Thomas Gleixner Cc: Linus Torvalds , Andrew Morton , LKML , Ingo Molnar , Len Brown , Venkatesh Pallipadi , "Rafael J. Wysocki" Subject: Re: [patch 0/2] suspend/resume regression fixes References: <20070922220347.586903979@linutronix.de> <46FD639D.9030301@rtr.ca> <1191011610.18681.94.camel@chaos> In-Reply-To: <1191011610.18681.94.camel@chaos> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1265 Lines: 31 Thomas Gleixner wrote: > On Fri, 2007-09-28 at 16:27 -0400, Mark Lord wrote: .. >> On a closely related note: I just now submitted a patch to fix SMP-poweroff, >> by having it do disable_nonboot_cpus before doing poweroff. >> >> Which has led me to thinking.. >> ..are similar precautions perhaps necessary for *all* ACPI BIOS calls? >> >> Because one never knows what the other CPUs are doing at the same time, >> and what the side effects may be on the ACPI BIOS functions. >> >> And also, I wonder if at a minimum we should be guaranteeing ACPI BIOS calls >> only ever happen from CPU#0 (or the "boot" CPU)? Or do we do that already? > > The ACPI calls are serialized in the kernel, AFAICT. But the fragile > situations (suspend, resume, shutdown, reboot) are probably those, where > some BIOS implementation expect that certain things are not called or > not active. Mmm.. *do* we actually do this for reboot? I don't see it there. And how about for kexec? I'm probably just missing seeing it. Right? Cheers - 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/