From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752543AbaJKPuj (ORCPT ); Sat, 11 Oct 2014 11:50:39 -0400 Received: from e33.co.us.ibm.com ([32.97.110.151]:57405 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752352AbaJKPuh (ORCPT ); Sat, 11 Oct 2014 11:50:37 -0400 Date: Sat, 11 Oct 2014 08:50:32 -0700 From: "Paul E. McKenney" To: Sasha Levin Cc: "David S. Miller" , tgraf@suug.ch, LKML Subject: Re: rhashtable: hang while running tests on boot Message-ID: <20141011155032.GZ4880@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <5437E1B3.6020409@oracle.com> <20141010142247.GU4880@linux.vnet.ibm.com> <5437ED21.2040500@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5437ED21.2040500@oracle.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14101115-0009-0000-0000-00000588505D Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 10, 2014 at 10:28:49AM -0400, Sasha Levin wrote: > On 10/10/2014 10:22 AM, Paul E. McKenney wrote: > > On Fri, Oct 10, 2014 at 09:40:03AM -0400, Sasha Levin wrote: > >> > Hi all, > >> > > >> > I'm sometimes observing the following hang during boot: > > Any chance of a .config? ;-) > > Attached. OK, and you already have CONFIG_PROVE_RCU=y, so scratch that advice. > > I am guessing that this happens only when running the resizable hashtable > > tests -- if that guess is incorrect, please let me know. > > I've seen it a few times only with rhashtable related traces, if that ever > changes I'll update - but for now I think it's safe to assume it's rhashtable > specific. Ah, so this is intermittent. Joy. Thanx, Paul