Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760001Ab2BJT3K (ORCPT ); Fri, 10 Feb 2012 14:29:10 -0500 Received: from mail-gy0-f174.google.com ([209.85.160.174]:60877 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751753Ab2BJT3I (ORCPT ); Fri, 10 Feb 2012 14:29:08 -0500 Date: Fri, 10 Feb 2012 17:29:01 -0200 From: Arnaldo Carvalho de Melo To: Steven Noonan Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, Paul Mackerras , Ingo Molnar , Konrad Rzeszutek Wilk , Jeremy Fitzhardinge Subject: Re: bisected: 'perf top' causing soft lockups under Xen Message-ID: <20120210192901.GK2526@infradead.org> References: <1328894901.25989.20.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Url: http://acmel.wordpress.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: 813 Lines: 18 Em Fri, Feb 10, 2012 at 11:27:23AM -0800, Steven Noonan escreveu: > > [ ?160.172856] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S > > [ ?160.172984] iwlwifi 0000:02:00.0: Radio type=0x1-0x2-0x0 > > It actually gets even more interesting. Once I did 'perf test' under > Xen, and I waited for it to finish, perf suddenly works fine. I can > re-run 'perf test -v 3' with no hangs, and can now run 'perf top' with > no issue. Bizarre. Heck, I keep wishing people use perf test more often to figure out bugs sooner, but this side effect was surprising! ;-) - Arnaldo -- 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/