Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753283Ab0HYLUA (ORCPT ); Wed, 25 Aug 2010 07:20:00 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:56026 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753009Ab0HYLT7 (ORCPT ); Wed, 25 Aug 2010 07:19:59 -0400 Date: Wed, 25 Aug 2010 13:19:44 +0200 From: Ingo Molnar To: Robert Richter Cc: Don Zickus , Peter Zijlstra , Cyrill Gorcunov , Lin Ming , "fweisbec@gmail.com" , "linux-kernel@vger.kernel.org" , "Huang, Ying" , Yinghai Lu , Andi Kleen Subject: Re: [PATCH -v3] perf, x86: try to handle unknown nmis with running perfctrs Message-ID: <20100825111944.GA21682@elte.hu> References: <9g472epksbkxhgmw6a3qh8r5.1282316687153@email.android.com> <20100820152510.GA4167@elte.hu> <20100825094819.GB3198@erda.amd.com> <20100825104130.GA27891@elte.hu> <20100825110218.GG3198@erda.amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100825110218.GG3198@erda.amd.com> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_20 autolearn=no SpamAssassin version=3.2.5 -1.0 BAYES_20 BODY: Bayesian spam probability is 5 to 20% [score: 0.1607] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 970 Lines: 28 * Robert Richter wrote: > On 25.08.10 06:41:30, Ingo Molnar wrote: > > > > > > > Uhhuh. NMI received for unknown reason 00 on CPU 9. > > > > > > Do you have a strange power saving mode enabled? > > > > > > Dazed and confused, but trying to continue > > > > Before the two patches i did not get these messages at all, on any > > of the systems. > > Yes, because all were eaten by NOTIFY_STOP, and that's why we also > lose NMIs from other sources, like the nmi button. The patches try to > fix this. I understand that, but obviously the patches need to fix the lack of messages without introducing new regressions: such as messages not seen before and CPUs with stuck NMIs. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/