From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755834AbZBKItj (ORCPT ); Wed, 11 Feb 2009 03:49:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753823AbZBKIta (ORCPT ); Wed, 11 Feb 2009 03:49:30 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:49199 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752602AbZBKIta (ORCPT ); Wed, 11 Feb 2009 03:49:30 -0500 Date: Wed, 11 Feb 2009 09:49:19 +0100 From: Ingo Molnar To: Steven Rostedt Cc: LKML , Andrew Morton , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker Subject: Re: git pull request for tip/tracing/urgent Message-ID: <20090211084919.GF21105@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Steven Rostedt wrote: > > Ingo, > > The bug that is fixed by this change can affect users. Most likely it will > not, since the fault should never happen. But this is a protective > mechanism, where if it does, that means there is a bug in the tracer. > > As you have previously told me, a bug in the tracer should never crash the > kernel. Since the detection of a fault in the function graph tracer can > lead to a kernel crash (without this change) I think this qualifies as > something for 29. Yeah, definitely so. > -- Steve > > > The following patch is in: > > git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git > > branch: tip/tracing/urgent > > > Steven Rostedt (1): > tracing, x86: fix fixup section to return to original code > > ---- > arch/x86/kernel/ftrace.c | 8 +++++--- > 1 files changed, 5 insertions(+), 3 deletions(-) Pulled into tip:tracing/urgent, thanks Steve! Ingo