From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755509AbcBZXMS (ORCPT ); Fri, 26 Feb 2016 18:12:18 -0500 Received: from mx1.redhat.com ([209.132.183.28]:52996 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752825AbcBZXMP (ORCPT ); Fri, 26 Feb 2016 18:12:15 -0500 Date: Sat, 27 Feb 2016 00:12:08 +0100 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: Steven Rostedt , Namhyung Kim , Ingo Molnar , Peter Zijlstra , Jiri Olsa , LKML , David Ahern , Andi Kleen , Stephane Eranian , Wang Nan Subject: Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Message-ID: <20160226231208.GD19398@krava.redhat.com> References: <1456512767-1164-1-git-send-email-namhyung@kernel.org> <1456512767-1164-4-git-send-email-namhyung@kernel.org> <20160226214307.GX8720@kernel.org> <20160226214506.GY8720@kernel.org> <20160226220819.GZ8720@kernel.org> <20160226172602.35b5ff47@gandalf.local.home> <20160226223705.GB8720@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160226223705.GB8720@kernel.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Fri, 26 Feb 2016 23:12:14 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 26, 2016 at 07:37:05PM -0300, Arnaldo Carvalho de Melo wrote: > Em Fri, Feb 26, 2016 at 05:26:02PM -0500, Steven Rostedt escreveu: > > On Fri, 26 Feb 2016 19:08:19 -0300 > > Arnaldo Carvalho de Melo wrote: > > > > > > > It is exploding at this depth, not liking how gfp_flags is described, problem > > > seems to be in this function, this __print_flags() long thing. > > > > > > Steven, does this look familiar? > > > > > > > > > > Hmm, trace-cmd has the same issue. I just having noticed. > > > > I'll see if I can fix it. > > Ok, this works well with an RHEL kernel being tested with tons of perf > backports by Jiri, its just with 4.5-rc kernels that this is exploding. thanks, I isolated this down to the: 156174999dd1 perf/intel/x86: Enlarge the PEBS buffer it's related to the FREERUNNING PEBS patchset that allows store more than 1 event in PEBS buffer seems like Core CPU doesn't like the default setup and delays in msr access, which makes the watchdog scream jirka