From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753701Ab0JDJHi (ORCPT ); Mon, 4 Oct 2010 05:07:38 -0400 Received: from one.firstfloor.org ([213.235.205.2]:56925 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753384Ab0JDJHh (ORCPT ); Mon, 4 Oct 2010 05:07:37 -0400 Date: Mon, 4 Oct 2010 11:07:28 +0200 From: Andi Kleen To: Stephane Eranian Cc: Robert Richter , Huang Ying , Don Zickus , Cyrill Gorcunov , "mingo@redhat.com" , "hpa@zytor.com" , "linux-kernel@vger.kernel.org" , "yinghai@kernel.org" , "andi@firstfloor.org" , "peterz@infradead.org" , "fweisbec@gmail.com" , "ming.m.lin@intel.com" , "tglx@linutronix.de" , "mingo@elte.hu" Subject: Re: [tip:perf/urgent] perf, x86: Catch spurious interrupts after disabling counters Message-ID: <20101004090728.GC20013@basil.fritz.box> References: <20100929170924.GR13563@erda.amd.com> <20100929181207.GW26290@redhat.com> <20100930091246.GV13563@erda.amd.com> <20100930194451.GI26290@redhat.com> <20101001071750.GB13563@erda.amd.com> <20101002093524.GJ13563@erda.amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I haven't seen Andi's suggestion. But I am guessing he is suggesting > adding a new chain that would be called first and where there would > ONLY be the perf_event subsystem. To handle the spurious PMU I was thinking of a separate NMI chain (and longer term really splitting the die chains into separate chains, that would solve other problems e.g. with page fault performance too) Possibly that NMI chain could be split up too, but not sure this is really needed. -Andi -- ak@linux.intel.com -- Speaking for myself only.