From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756253AbaAFWQC (ORCPT ); Mon, 6 Jan 2014 17:16:02 -0500 Received: from merlin.infradead.org ([205.233.59.134]:42580 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754838AbaAFWQA (ORCPT ); Mon, 6 Jan 2014 17:16:00 -0500 Date: Mon, 6 Jan 2014 23:15:28 +0100 From: Peter Zijlstra To: Andi Kleen Cc: Alexander Shishkin , Ingo Molnar , Arnaldo Carvalho de Melo , Ingo Molnar , linux-kernel@vger.kernel.org, David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Stephane Eranian Subject: Re: [PATCH v0 04/71] itrace: Infrastructure for instruction flow tracing units Message-ID: <20140106221528.GK30183@twins.programming.kicks-ass.net> References: <87zjnys0gj.fsf@ashishki-desk.ger.corp.intel.com> <20131218150900.GU21999@twins.programming.kicks-ass.net> <87wqj1s2d3.fsf@ashishki-desk.ger.corp.intel.com> <20131219103134.GD30183@twins.programming.kicks-ass.net> <87ob4drsww.fsf@ashishki-desk.ger.corp.intel.com> <20131219112812.GY21999@twins.programming.kicks-ass.net> <20131219123955.GA18186@gmail.com> <87haa4kj4y.fsf@ashishki-desk.ger.corp.intel.com> <20131219151024.GI16438@laptop.programming.kicks-ass.net> <87iotw6bwx.fsf@tassilo.jf.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87iotw6bwx.fsf@tassilo.jf.intel.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I don't think the PT design is broken in any way, it's straight > forward and simple. Also, do clarify the other points I asked about. Esp. the non FREEZE_ON_PMI behaviour of the PT PMI is worrying me immensely. To me it seems very weird that PT is hooked to the same PMI as the normal PMU, it really should have been a different interrupt.