From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751474AbaHMFh7 (ORCPT ); Wed, 13 Aug 2014 01:37:59 -0400 Received: from lgeamrelo01.lge.com ([156.147.1.125]:55371 "EHLO lgeamrelo01.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750757AbaHMFh6 (ORCPT ); Wed, 13 Aug 2014 01:37:58 -0400 X-Original-SENDERIP: 10.177.220.181 X-Original-MAILFROM: namhyung@gmail.com From: Namhyung Kim To: Adrian Hunter Cc: Arnaldo Carvalho de Melo , Peter Zijlstra , linux-kernel@vger.kernel.org, David Ahern , Frederic Weisbecker , Jiri Olsa , Paul Mackerras , Stephane Eranian Subject: Re: [PATCH 3/4] perf tools: Fix probing the kernel API with cpu-wide events References: <1407855871-15024-1-git-send-email-adrian.hunter@intel.com> <1407855871-15024-4-git-send-email-adrian.hunter@intel.com> Date: Wed, 13 Aug 2014 14:37:57 +0900 In-Reply-To: <1407855871-15024-4-git-send-email-adrian.hunter@intel.com> (Adrian Hunter's message of "Tue, 12 Aug 2014 18:04:30 +0300") Message-ID: <87egwldk5m.fsf@sejong.aot.lge.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 12 Aug 2014 18:04:30 +0300, Adrian Hunter wrote: > Fall back to probing with the current pid if cpu-wide > probing fails. This primarily affects the setting of > comm_exec flag when the user is un-privileged and > /proc/sys/kernel/perf_event_paranoid > 0. The change > to comm_exec can be observed by using -vv with > perf record and a kernel that supports comm_exec. Maybe I'm missing something - why not just try process-wide probing in the first place? Thanks, Namhyung