From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932104Ab0ITTeX (ORCPT ); Mon, 20 Sep 2010 15:34:23 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:51626 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757135Ab0ITTeU (ORCPT ); Mon, 20 Sep 2010 15:34:20 -0400 Date: Mon, 20 Sep 2010 12:34:17 -0700 From: "Paul E. McKenney" To: Rolf Eike Beer Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki Subject: Re: [Bug #16537] TREE_RCU hangs at boot Message-ID: <20100920193417.GG2408@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20100920182626.GE2408@linux.vnet.ibm.com> <201009202120.36708.eike-kernel@sf-tec.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201009202120.36708.eike-kernel@sf-tec.de> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 20, 2010 at 09:20:27PM +0200, Rolf Eike Beer wrote: > Paul E. McKenney wrote: > > On Sun, Sep 12, 2010 at 09:08:42PM +0200, Rafael J. Wysocki wrote: > > > This message has been generated automatically as a part of a report > > > of regressions introduced between 2.6.34 and 2.6.35. > > > > > > The following bug entry is on the current list of known regressions > > > introduced between 2.6.34 and 2.6.35. Please verify if it still should > > > be listed and let the tracking team know (either way). > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16537 > > > Subject : TREE_RCU hangs at boot > > > Submitter : Rolf Eike Beer > > > Date : 2010-08-07 12:18 (37 days old) > > > Handled-By : Paul E. McKenney > > > > I cannot reproduce this. The function that is claimed to hang contains > > only printk()s. I have asked the guys who can actually reproduce it > > to try a later kernel, and will let you know how this goes. > > > > If you cannot trust printk(), who can you trust? ;-) > > I suspect that it is related to: > > http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.35.y.git;a=commit;h=5a8477871f0b45664eedfa352c3942093408a169 > > I'll try to test plain 2.6.35 with this patch and see it this works. That would explain my utter failure to reproduce this bug -- I don't have a PA-RISC system. ;-) Thanx, Paul