Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755878AbaDBAIO (ORCPT ); Tue, 1 Apr 2014 20:08:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51279 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756550AbaDBAII (ORCPT ); Tue, 1 Apr 2014 20:08:08 -0400 Date: Tue, 1 Apr 2014 20:07:58 -0400 From: Dave Jones To: "Paul E. McKenney" Cc: Linux Kernel Subject: Re: rcu_prempt stalls / lockup Message-ID: <20140402000758.GA1440@redhat.com> Mail-Followup-To: Dave Jones , "Paul E. McKenney" , Linux Kernel References: <20140401150849.GA14757@redhat.com> <20140401153032.GT4284@linux.vnet.ibm.com> <20140401172244.GA10363@redhat.com> <20140401175545.GV4284@linux.vnet.ibm.com> <20140401180414.GA12326@redhat.com> <20140401183245.GA12473@linux.vnet.ibm.com> <20140401221616.GA961@redhat.com> <20140401231822.GC4284@linux.vnet.ibm.com> <20140401233130.GA25030@redhat.com> <20140401235724.GD4284@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140401235724.GD4284@linux.vnet.ibm.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 On Tue, Apr 01, 2014 at 04:57:24PM -0700, Paul E. McKenney wrote: > > [ 917.790265] INFO: rcu_preempt detected stalls on CPUs/tasks: > > [ 917.791189] (detected by 0, t=6502 jiffies, g=21390, c=21389, q=0) > > But the hang didn't happen until grace period #21390. Sigh! That means > that the trace doesn't tell me about the current grace period. > > Thank you for getting this info, but it is beginning to look like > bisection is necessary here. :-( ok, I was hoping that wouldn't be the case, but let's see what it turns up. Dave -- 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/