From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934191AbZDBB5V (ORCPT ); Wed, 1 Apr 2009 21:57:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757060AbZDBB5L (ORCPT ); Wed, 1 Apr 2009 21:57:11 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:47304 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755716AbZDBB5K (ORCPT ); Wed, 1 Apr 2009 21:57:10 -0400 Date: Thu, 2 Apr 2009 03:55:31 +0200 From: Ingo Molnar To: Steven Rostedt Cc: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, fweisbec@gmail.com, tglx@linutronix.de, Johannes Berg , Linus Torvalds , Greg KH , linux-tip-commits@vger.kernel.org, stable@kernel.org Subject: Re: [tip:tracing/syscalls] tracing/core: fix early free of cpumasks Message-ID: <20090402015531.GA12489@elte.hu> References: <1237164303-11476-1-git-send-email-fweisbec@gmail.com> <20090402011232.GA32066@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090402011232.GA32066@goodmis.org> 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: > This never made it into 2.6.29, nor do I see it yet in mainline. > > This can cause unpredictable results with ftrace. We are freeing a > cpu mask that will be later used. Yes ... but CONFIG_OFFSTACK is only possible as a debug option right now. So it's far less serious of an issue, it needs 2-3 unlikely features to be combined. The fix looks simple enough, so once the tracing tree is upstream, we can forward it to -stable. Ingo