From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753795Ab1ASXMe (ORCPT ); Wed, 19 Jan 2011 18:12:34 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:52769 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753106Ab1ASXMd (ORCPT ); Wed, 19 Jan 2011 18:12:33 -0500 Date: Thu, 20 Jan 2011 00:11:16 +0100 From: Ingo Molnar To: Tejun Heo Cc: Pekka Enberg , Peter Zijlstra , Linus Torvalds , Linux Kernel Mailing List , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , Pekka Enberg Subject: Re: percpu related boot crash on x86 (was: Linux 2.6.38-rc1) Message-ID: <20110119231116.GA3896@elte.hu> References: <20110119120200.GA1057@elte.hu> <1295441307.28776.15.camel@laptop> <20110119131329.GB14096@mtj.dyndns.org> <20110119205353.GA14810@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110119205353.GA14810@elte.hu> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -2.0 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 * Ingo Molnar wrote: > Btw., based on Peter's suggestion i tried the limit-bumping hack below - but it > did not help, the crash still triggers on 5%-10% of all randconfig bootups. I'm now running tests with MAXSMP forcibly disabled - and there are no crashes after 69 randconfig iteration. Before it would crash within 10 iterations. So it seems the MAXSMP sizing tests triggers a new percpu regression. Thanks, Ingo