From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752852AbXCUN5M (ORCPT ); Wed, 21 Mar 2007 09:57:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752851AbXCUN5L (ORCPT ); Wed, 21 Mar 2007 09:57:11 -0400 Received: from www.osadl.org ([213.239.205.134]:48142 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752852AbXCUN5L (ORCPT ); Wed, 21 Mar 2007 09:57:11 -0400 Subject: Re: [PATCH] clockevents: Fix suspend/resume to disk hangs From: Thomas Gleixner Reply-To: tglx@linutronix.de To: Marcus Better Cc: linux-kernel@vger.kernel.org, Andi Kleen In-Reply-To: References: <200703162134.14265.rjw@sisk.pl> <1174078066.13341.279.camel@localhost.localdomain> <1174087552.13341.332.camel@localhost.localdomain> Content-Type: text/plain Date: Wed, 21 Mar 2007 15:04:22 +0100 Message-Id: <1174485863.10840.80.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2007-03-20 at 10:35 +0100, Marcus Better wrote: > Thomas Gleixner wrote: > > > I finally found a dual core box, which survives suspend/resume without > > crashing in the middle of nowhere. Sigh, I never figured out from the > > code and the bug reports what's going on. > > > > The observed hangs are caused by a stale state transition of the clock > > event devices, which keeps the RCU synchronization away from completion, > > when the non boot CPU is brought back up. > > This didn't fix the suspend problems on my Thinkpad R60. (Sorry for > nagging - please let me know if I can assist in debugging this...) I did not expect that it fixes your problem. clockevents are only used in arch/i386 right now. You are running a 64 bit kernel, so a change of your problem would have been very surprising. You said, that the breakage came between 2.6.20 and rc2. Can you bisect it ? tglx