From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751267AbXCKUX4 (ORCPT ); Sun, 11 Mar 2007 16:23:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751229AbXCKUX4 (ORCPT ); Sun, 11 Mar 2007 16:23:56 -0400 Received: from mx1.redhat.com ([66.187.233.31]:53601 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751199AbXCKUX4 (ORCPT ); Sun, 11 Mar 2007 16:23:56 -0400 Message-ID: <45F46530.8050005@redhat.com> Date: Sun, 11 Mar 2007 21:23:12 +0100 From: Milan Broz User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: "Rafael J. Wysocki" CC: Thomas Meyer , linux-kernel@vger.kernel.org, Pavel Machek , Thomas Gleixner Subject: Re: SwSusp to disk doesn't work - Try 2 References: <45F44599.3060508@m3y3r.de> <200703111926.20183.rjw@sisk.pl> <45F452A2.2050009@redhat.com> <200703112038.52375.rjw@sisk.pl> In-Reply-To: <200703112038.52375.rjw@sisk.pl> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rafael J. Wysocki: > Ah, NO_HZ. Thomas Gleixner's address added to the Cc list. > >> short printk trace >> >> enable_nonboot_cpus >> _cpu_up >> raw_notifier_callchain (CPU_UP_PREPARE) >> ... >> update_sched_domains >> detach_destroy_domains >> [waits here] --> synchronize_sched (==synchronize_rcu) > > Well, I think the call to wait_for_completion() does not return, probably > because the task supposed to complete the completion is frozen at this > point. Can you please try to confirm that it gets stuck on > wait_for_completion() in synchronize_rcu()? Yes, it's in wait_for_completion() in synchronize_rcu(). As noted in some previous mail, it will wake up after event - key press etc. Patch in http://lkml.org/lkml/2007/3/7/255 solves different problem. I added it to my quilt and applied anyway -> no change. Milan