From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755449Ab0IUTIu (ORCPT ); Tue, 21 Sep 2010 15:08:50 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:55818 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751749Ab0IUTIt (ORCPT ); Tue, 21 Sep 2010 15:08:49 -0400 From: "Rafael J. Wysocki" To: paulmck@linux.vnet.ibm.com Subject: Re: [Bug #16537] TREE_RCU hangs at boot Date: Tue, 21 Sep 2010 21:07:54 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.36-rc4-rjw+; KDE/4.4.4; x86_64; ; ) Cc: Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Rolf Eike Beer References: <20100920182626.GE2408@linux.vnet.ibm.com> <20100921185953.GA7880@linux.vnet.ibm.com> In-Reply-To: <20100921185953.GA7880@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201009212107.54606.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday, September 21, 2010, Paul E. McKenney wrote: > On Mon, Sep 20, 2010 at 11:26:27AM -0700, 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? ;-) > > It turns out that this problem is due to tab processing in the PA-RISC > firmware, which certainly explains my inability to reproduce it. It > turns out that it is fixed by: > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d9b68e5e88248bb24fd4e455588bea1d56108fd6 > > So we can close this regression. > > Many thanks to Guy Martin for much help with > this!!! Thanks, closed. Rafael