From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755562Ab0CISqS (ORCPT ); Tue, 9 Mar 2010 13:46:18 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:42678 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751643Ab0CISqP (ORCPT ); Tue, 9 Mar 2010 13:46:15 -0500 X-Authority-Analysis: v=1.0 c=1 a=drjUTJznMZEA:10 a=7U3hwN5JcxgA:10 a=Q9fys5e9bTEA:10 a=IN5h458DF_uzvNNN74AA:9 a=swljyVWDS72NeliHE5A1LyGPqJkA:4 a=PUjeQqilurYA:10 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.89.75 Subject: Re: [BUG] WARNING: at kernel/trace/ring_buffer.c:3420 From: Steven Rostedt Reply-To: rostedt@goodmis.org To: Lai Jiangshan Cc: Ingo Molnar , Li Zefan , Frederic Weisbecker , LKML , "Paul E. McKenney" In-Reply-To: <1268155703.10871.1872.camel@gandalf.stny.rr.com> References: <4B94936B.8030409@cn.fujitsu.com> <4B949E43.2010906@cn.fujitsu.com> <1268060596.10871.1805.camel@gandalf.stny.rr.com> <1268060858.10871.1807.camel@gandalf.stny.rr.com> <4B95C1FC.9030307@cn.fujitsu.com> <1268155703.10871.1872.camel@gandalf.stny.rr.com> Content-Type: text/plain; charset="ISO-8859-15" Organization: Kihon Technologies Inc. Date: Tue, 09 Mar 2010 13:46:12 -0500 Message-ID: <1268160372.10871.1874.camel@gandalf.stny.rr.com> Mime-Version: 1.0 X-Mailer: Evolution 2.28.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2010-03-09 at 12:28 -0500, Steven Rostedt wrote: > On Tue, 2010-03-09 at 11:35 +0800, Lai Jiangshan wrote: > With Li's test, I was able to trigger the ring_buffer warning about > resetting while committing. I was still able to trigger it with your > patch to move the ring buffer disable code. But I did not trigger it > with both the ring buffer disable code _and_ your RCU fix. Spoke too soon. I hit it again. But I think I know why. -- Steve