Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751805AbcCJNyG (ORCPT ); Thu, 10 Mar 2016 08:54:06 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:57016 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751569AbcCJNxv (ORCPT ); Thu, 10 Mar 2016 08:53:51 -0500 Date: Thu, 10 Mar 2016 14:53:43 +0100 From: Peter Zijlstra To: Stephane Eranian Cc: Andi Kleen , LKML , Arnaldo Carvalho de Melo , "mingo@elte.hu" , "Liang, Kan" , Jiri Olsa , Namhyung Kim , Adrian Hunter Subject: Re: [PATCH 2/3] perf/x86/pebs: add workaround for broken OVFL status on HSW Message-ID: <20160310135343.GL6375@twins.programming.kicks-ass.net> References: <1457034642-21837-1-git-send-email-eranian@google.com> <1457034642-21837-3-git-send-email-eranian@google.com> <20160303214312.GI23621@tassilo.jf.intel.com> <20160307102413.GB6356@twins.programming.kicks-ass.net> <20160307121840.GF6375@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160307121840.GF6375@twins.programming.kicks-ass.net> 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 Content-Length: 709 Lines: 19 On Mon, Mar 07, 2016 at 01:18:40PM +0100, Peter Zijlstra wrote: > On Mon, Mar 07, 2016 at 11:24:13AM +0100, Peter Zijlstra wrote: > > > I suspect Andi is having something along: > > > > lkml.kernel.org/r/1445458568-16956-1-git-send-email-andi@firstfloor.org > > > > applied to his tree. > > OK, I munged a bunch of patches together, please have a hard look at the > end result found in: > > git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core So while running tip/master I just triggered the "irq loop stuck" warn on my IVB, with status==1, and PMC0 didn't look weird at all. I've not seen that for a fair while. But it does show it still happens on not quite antique hardware.