From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754017Ab3JCI6U (ORCPT ); Thu, 3 Oct 2013 04:58:20 -0400 Received: from merlin.infradead.org ([205.233.59.134]:40278 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753036Ab3JCI6T (ORCPT ); Thu, 3 Oct 2013 04:58:19 -0400 Date: Thu, 3 Oct 2013 10:58:07 +0200 From: Peter Zijlstra To: Adrian Hunter Cc: Jiri Olsa , Arnaldo Carvalho de Melo , linux-kernel@vger.kernel.org, David Ahern , Frederic Weisbecker , Mike Galbraith , Namhyung Kim , Paul Mackerras , Stephane Eranian Subject: Re: [BUG] perf tests: Test converting perf time to TSC Message-ID: <20131003085807.GO26785@twins.programming.kicks-ass.net> References: <20131002132308.GB20396@krava.brq.redhat.com> <524C23D3.6020300@intel.com> <20131003081737.GB993@krava.brq.redhat.com> <524D2E06.5020801@intel.com> <20131003085625.GA3081@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131003085625.GA3081@twins.programming.kicks-ass.net> 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 On Thu, Oct 03, 2013 at 10:56:25AM +0200, Peter Zijlstra wrote: > > No the ABI is broken in that case - better to crash. > > No; neither case should crash. OK; previously we would report cap_usr_time = 1 even though we might not have written stuff into the fields; which would indeed explain the crash. However; Jiri actually has the patch; as the code he posted had 'user' not 'usr'