Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757593Ab3GLKbX (ORCPT ); Fri, 12 Jul 2013 06:31:23 -0400 Received: from mail-ea0-f179.google.com ([209.85.215.179]:41630 "EHLO mail-ea0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757244Ab3GLKbV (ORCPT ); Fri, 12 Jul 2013 06:31:21 -0400 Date: Fri, 12 Jul 2013 12:31:17 +0200 From: Ingo Molnar To: Dave Jones , Markus Trippelsdorf , Thomas Gleixner , Linus Torvalds , Linux Kernel , Peter Anvin , Peter Zijlstra , Dave Hansen Subject: Re: Yet more softlockups. Message-ID: <20130712103117.GA14862@gmail.com> References: <20130704015525.GA8486@redhat.com> <20130705143821.GB325@redhat.com> <20130705160043.GF325@redhat.com> <20130706072408.GA14865@gmail.com> <20130710151324.GA11309@redhat.com> <20130710152015.GA757@x4> <20130710154029.GB11309@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130710154029.GB11309@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 957 Lines: 30 * Dave Jones wrote: > On Wed, Jul 10, 2013 at 05:20:15PM +0200, Markus Trippelsdorf wrote: > > On 2013.07.10 at 11:13 -0400, Dave Jones wrote: > > > I get this right after booting.. > > > > > > [ 114.516619] perf samples too long (4262 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 > > > > You can disable this warning by: > > > > echo 0 > /proc/sys/kernel/perf_cpu_time_max_percent > > Yes, but why is this even being run when I'm not running perf ? > > The only NMI source running should be the watchdog. The NMI watchdog is a perf event. I've Cc:-ed Dave Hansen, the author of those changes - is this a false positive or some real problem? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/