From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754621Ab2GWSqe (ORCPT ); Mon, 23 Jul 2012 14:46:34 -0400 Received: from fold.natur.cuni.cz ([195.113.57.32]:57648 "HELO fold.natur.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750970Ab2GWSqc (ORCPT ); Mon, 23 Jul 2012 14:46:32 -0400 Message-ID: <500D9BFC.9090707@fold.natur.cuni.cz> Date: Mon, 23 Jul 2012 20:46:20 +0200 From: Martin Mokrejs User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120706 Firefox/13.0.1 SeaMonkey/2.10.1 MIME-Version: 1.0 To: Mike Galbraith CC: Michael Wang , LKML , "paulmck@linux.vnet.ibm.com" , mmokrejs@fold.natur.cuni.cz, dan.carpenter@oracle.com Subject: Re: [QUESTION ON BUG] the rcu stall issue could not be reproduced References: <5008CBD4.6070907@linux.vnet.ibm.com> <1342767624.7432.54.camel@marge.simpson.net> In-Reply-To: <1342767624.7432.54.camel@marge.simpson.net> X-Enigmail-Version: 1.4.2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I see few more RCU bugs reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43028 https://bugzilla.kernel.org/show_bug.cgi?id=40092 https://bugzilla.kernel.org/show_bug.cgi?id=42997 And, I placed my previous long email with logs at https://bugzilla.kernel.org/show_bug.cgi?id=45091 Hope this helps eventually once. Martin Mike Galbraith wrote: > On Fri, 2012-07-20 at 11:09 +0800, Michael Wang wrote: >> Hi, Mike, Martin, Dan >> >> I'm currently taking an eye on the rcu stall issue which was reported by >> you in the mail: >> >> rcu: endless stalls >> From: Mike Galbraith >> linux-3.4-rc7: rcu_sched self-detected stall on CPU >> From: Martin Mokrejs >> RCU stalls in linux-next >> From: Dan Carpenter >> >> I try to reproduce the issue on my X86 server with 12 cpu > > The 'endless stalls' box was 341.33333 times larger. Dunno if you can > even set a serial port slow enough to approximate all cores trying to > gripe through a single pinhole simultaneously. > > -Mike > >