Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755428AbaAVSn0 (ORCPT ); Wed, 22 Jan 2014 13:43:26 -0500 Received: from merlin.infradead.org ([205.233.59.134]:37581 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752572AbaAVSnY (ORCPT ); Wed, 22 Jan 2014 13:43:24 -0500 Date: Wed, 22 Jan 2014 19:42:53 +0100 From: Peter Zijlstra To: Markus Trippelsdorf Cc: Sasha Levin , Arjan van de Ven , lenb@kernel.org, rjw@rjwysocki.net, Eliezer Tamir , rui.zhang@intel.com, jacob.jun.pan@linux.intel.com, Mike Galbraith , Ingo Molnar , hpa@zytor.com, paulmck@linux.vnet.ibm.com, Thomas Gleixner , John Stultz , Andy Lutomirski , linux-kernel@vger.kernel.org, dyoung@redhat.com Subject: Re: [PATCH 13/15] sched: Use a static_key for sched_clock_stable Message-ID: <20140122184253.GN30183@twins.programming.kicks-ass.net> References: <20131212141655.362219382@infradead.org> <52DEF495.2020304@oracle.com> <20140122104532.GJ31570@twins.programming.kicks-ass.net> <20140122120048.GB389@x4> <20140122120757.GL31570@twins.programming.kicks-ass.net> <20140122122609.GA392@x4> <20140122123022.GN31570@twins.programming.kicks-ass.net> <20140122131456.GA389@x4> <52DFD50E.800@oracle.com> <20140122183538.GA389@x4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140122183538.GA389@x4> 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 Wed, Jan 22, 2014 at 07:35:38PM +0100, Markus Trippelsdorf wrote: > >FYI it happens on real hardware on my machine: > >[ 60.375384] process: using AMD E400 aware idle routine > But this is a different issue. I've bisected it to: > > commit 20d1c86a57762f0a33a78988e3fc8818316badd4 > Author: Peter Zijlstra > Date: Fri Nov 29 15:40:29 2013 +0100 > > sched/clock, x86: Rewrite cyc2ns() to avoid the need to disable IRQs > > Reverting the commit "fixes" the issue: Hurm.. what kind of AMD machine is that? -- 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/