Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756913Ab0HPW43 (ORCPT ); Mon, 16 Aug 2010 18:56:29 -0400 Received: from va3ehsobe006.messaging.microsoft.com ([216.32.180.16]:25234 "EHLO VA3EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756103Ab0HPW42 (ORCPT ); Mon, 16 Aug 2010 18:56:28 -0400 X-SpamScore: 12 X-BigFish: VPS12(z3cfcs329eqzbb2cK98dNzz1202hzzz32i2a8h43h62h) X-Spam-TCS-SCL: 1:0 X-WSS-ID: 0L79P0D-02-82Y-02 X-M-MSG: Date: Tue, 17 Aug 2010 00:55:25 +0200 From: Robert Richter To: Cyrill Gorcunov CC: Peter Zijlstra , Don Zickus , Lin Ming , Ingo Molnar , "fweisbec@gmail.com" , "linux-kernel@vger.kernel.org" , "Huang, Ying" , Yinghai Lu , Andi Kleen Subject: Re: [PATCH -v2] perf, x86: try to handle unknown nmis with running perfctrs Message-ID: <20100816225525.GO26154@erda.amd.com> References: <20100804163930.GE5130@lenovo> <20100804184806.GL26154@erda.amd.com> <20100804192634.GG5130@lenovo> <20100806065203.GR26154@erda.amd.com> <20100806142131.GA1874@redhat.com> <20100809194829.GB26154@erda.amd.com> <20100816190659.GI5805@lenovo> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20100816190659.GI5805@lenovo> User-Agent: Mutt/1.5.20 (2009-06-14) X-Reverse-DNS: unknown Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 899 Lines: 25 On 16.08.10 15:06:59, Cyrill Gorcunov wrote: > I suspect Peter was supposed to be in To: field ;) It was the attempt to answer 2 mails with one. :) > Robert, I think we still may miss unknown irq, consider the case when > unknown nmi is latched while you handle nmi from perf and what is > more interesting several counters may be overflowed. So you set > delta small enough and second (unknown nmi) will be in range and > treated as being perf back-to-back, or I miss something from patch? Yes, that's true, but before you have to enable your Infinite Improbability Drive. -Robert -- Advanced Micro Devices, Inc. Operating System Research Center -- 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/