Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754806AbZKIUq2 (ORCPT ); Mon, 9 Nov 2009 15:46:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754715AbZKIUq1 (ORCPT ); Mon, 9 Nov 2009 15:46:27 -0500 Received: from ogre.sisk.pl ([217.79.144.158]:52501 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754706AbZKIUqZ (ORCPT ); Mon, 9 Nov 2009 15:46:25 -0500 From: "Rafael J. Wysocki" To: Alan Stern Subject: Re: [linux-pm] Help needed: Resume problems in 2.6.32-rc, perhaps related to preempt_count leakage in keventd Date: Mon, 9 Nov 2009 21:48:03 +0100 User-Agent: KMail/1.12.1 (Linux/2.6.31.5-tst; KDE/4.3.1; x86_64; ; ) Cc: Thomas Gleixner , Mike Galbraith , Greg KH , LKML , Jesse Barnes , Ingo Molnar , Linus Torvalds , pm list References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200911092148.03815.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 923 Lines: 24 On Monday 09 November 2009, Alan Stern wrote: > On Mon, 9 Nov 2009, Rafael J. Wysocki wrote: > > > Still, RIP always points to list_del_init(cwq->worklist.next); in > > run_workqueue(). > > Use a big hammer: Create a new global variable, set it to 1 while > resuming and back to 0 after the tasks have been thawed. While the > variable is nonzero, print in the log the list pointers in > cwq->worklist just before executing the list_del_init(). Maybe also > print some other interesting information about cwq. I've just sent a message containing full call trace. It shows the problem is a general protection fault that happens _after_ we've thawed tasks. Thanks, Rafael -- 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/