From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761193Ab2DLAYY (ORCPT ); Wed, 11 Apr 2012 20:24:24 -0400 Received: from shards.monkeyblade.net ([198.137.202.13]:60254 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752475Ab2DLAYW (ORCPT ); Wed, 11 Apr 2012 20:24:22 -0400 Date: Wed, 11 Apr 2012 20:18:54 -0400 (EDT) Message-Id: <20120411.201854.1070083308359208025.davem@davemloft.net> To: shemminger@vyatta.com Cc: paulmck@linux.vnet.ibm.com, mroos@linux.ee, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: suspicious RCU usage warnings in 3.3.0 From: David Miller In-Reply-To: <20120411171004.016ddd95@nehalam.linuxnetplumber.net> References: <20120411230837.GC2473@linux.vnet.ibm.com> <20120411171004.016ddd95@nehalam.linuxnetplumber.net> X-Mailer: Mew version 6.4 on Emacs 23.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.6 (shards.monkeyblade.net [198.137.202.13]); Wed, 11 Apr 2012 17:18:57 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephen Hemminger Date: Wed, 11 Apr 2012 17:10:04 -0700 > 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. So is there anything specific I need to do in the sparc64 idle loop?