From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751890AbdBFNSh (ORCPT ); Mon, 6 Feb 2017 08:18:37 -0500 Received: from mail-wj0-f196.google.com ([209.85.210.196]:33419 "EHLO mail-wj0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751115AbdBFNSg (ORCPT ); Mon, 6 Feb 2017 08:18:36 -0500 Date: Mon, 6 Feb 2017 14:18:32 +0100 From: Robert Richter To: Borislav Petkov Cc: Ingo Molnar , Arnaldo Carvalho de Melo , Peter Zijlstra , Vince Weaver , lkml Subject: Re: [RFC PATCH] perf/stat: Add --disable-hwdt Message-ID: <20170206131832.GG4906@rric.localdomain> References: <20170206121506.mtknwusus4djp2sx@pd.tnic> <20170206122231.GA9404@gmail.com> <20170206124116.7jmrmufthqtnd3dc@pd.tnic> <20170206124447.GA12772@gmail.com> <20170206124937.zlowglr5gpq35piy@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170206124937.zlowglr5gpq35piy@pd.tnic> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06.02.17 13:49:37, Borislav Petkov wrote: > On Mon, Feb 06, 2017 at 01:44:48PM +0100, Ingo Molnar wrote: > > Yeah, if for some whatever reason perf locks up while running perf stat as root, > > so I'd keep the option, as a general principle. :-/ > > --dont-disable-hwdt it is. Isn't there the danger the previous watchdog state is never restored if for some reason perf got killed? So maybe have some other task running that restores it once perf is gone. -Robert