From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933306Ab2DLAKJ (ORCPT ); Wed, 11 Apr 2012 20:10:09 -0400 Received: from mail.vyatta.com ([76.74.103.46]:54572 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756173Ab2DLAKH (ORCPT ); Wed, 11 Apr 2012 20:10:07 -0400 Date: Wed, 11 Apr 2012 17:10:04 -0700 From: Stephen Hemminger To: paulmck@linux.vnet.ibm.com Cc: Meelis Roos , David Miller , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: suspicious RCU usage warnings in 3.3.0 Message-ID: <20120411171004.016ddd95@nehalam.linuxnetplumber.net> In-Reply-To: <20120411230837.GC2473@linux.vnet.ibm.com> References: <20120328.174559.650861844028495880.davem@davemloft.net> <20120411230837.GC2473@linux.vnet.ibm.com> Organization: Vyatta X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 11 Apr 2012 16:08:37 -0700 "Paul E. McKenney" wrote: > Hmmm... What CPU family is this running on? From the look of the > stack, it is sneaking out of idle into softirq without telling RCU. > This would cause RCU to complain bitterly about being invoked from > the idle loop -- and RCU ignores CPUs in the idle loop. > > Thanx, Paul Sun4... Ping David.