From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754234AbcHWRtX (ORCPT ); Tue, 23 Aug 2016 13:49:23 -0400 Received: from merlin.infradead.org ([205.233.59.134]:51260 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754010AbcHWRtR (ORCPT ); Tue, 23 Aug 2016 13:49:17 -0400 Date: Tue, 23 Aug 2016 19:06:51 +0200 From: Peter Zijlstra To: Will Deacon Cc: Alexander Shishkin , Vince Weaver , Linux Kernel Mailing List , Ingo Molnar , Arnaldo Carvalho de Melo Subject: Re: perf: WARNING: kernel/events/core.c:4893 perf_mmap_close Message-ID: <20160823170651.GS10153@twins.programming.kicks-ass.net> References: <87k2fqmska.fsf@ashishki-desk.ger.corp.intel.com> <20160823151239.GA29462@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160823151239.GA29462@arm.com> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 23, 2016 at 04:12:42PM +0100, Will Deacon wrote: > Hi Alexander, > > On Fri, Aug 12, 2016 at 08:54:49PM +0300, Alexander Shishkin wrote: > > Yes, I tracked to a race between unmapping and set_output, trying to > > come up with a good fix now. > > Did you get anywhere with this? I think I just hit the same issue with > the intel-pt driver on my broadwell laptop with -rc3+PREEMPT (dump > below) and I'm more than happy to test a fix. lkml.kernel.org/r/1471942474-1854-1-git-send-email-alexander.shishkin@linux.intel.com