Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934287Ab3HHNVG (ORCPT ); Thu, 8 Aug 2013 09:21:06 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:32266 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934221Ab3HHNVE (ORCPT ); Thu, 8 Aug 2013 09:21:04 -0400 X-Authority-Analysis: v=2.0 cv=P6i4d18u c=1 sm=0 a=Sro2XwOs0tJUSHxCKfOySw==:17 a=Drc5e87SC40A:10 a=48llYAvPBHsA:10 a=5SG0PmZfjMsA:10 a=IkcTkHD0fZMA:10 a=meVymXHHAAAA:8 a=KGjhK52YXX0A:10 a=r-PqRJr4KhwA:10 a=7NC6DI7Wmgfcf6NknTMA:9 a=QEXdDO2ut3YA:10 a=zlrGdX7v4sEA:10 a=QvK5AWxnUaoA:10 a=Sro2XwOs0tJUSHxCKfOySw==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 67.255.60.225 Message-ID: <1375968063.6848.56.camel@gandalf.local.home> Subject: Re: [BUG] hackbench locks up with perf in 3.11-rc1 and beyond From: Steven Rostedt To: LKML Cc: Linus Torvalds , Andrew Morton , Joonsoo Kim , Christoph Lameeter , Wanpeng Li , Pekka Enberg Date: Thu, 08 Aug 2013 09:21:03 -0400 In-Reply-To: <1375934936.6848.41.camel@gandalf.local.home> References: <1375934936.6848.41.camel@gandalf.local.home> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4-3 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 526 Lines: 18 On Thu, 2013-08-08 at 00:08 -0400, Steven Rostedt wrote: > I went to do some benchmarks on the jump label code, and ran: > > > perf stat -r 100 ./hackbench 50 > Note, perf doesn't even need to be involved. Running hackbench manually three times causes the bug too. -- Steve -- 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/