From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757113Ab2E3VsW (ORCPT ); Wed, 30 May 2012 17:48:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53512 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754181Ab2E3VsU (ORCPT ); Wed, 30 May 2012 17:48:20 -0400 Date: Wed, 30 May 2012 17:48:09 -0400 From: Dave Jones To: tglx@linutronix.de Cc: Linux Kernel Subject: NOHZ: local_softirq_pending 08 Message-ID: <20120530214809.GA19223@redhat.com> Mail-Followup-To: Dave Jones , tglx@linutronix.de, Linux Kernel MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 Thomas, I've been seeing these messages more and more lately. When I start a kernel build for eg, it seems to spew regularly.. May 30 17:42:00 [ 1030.651976] NOHZ: local_softirq_pending 08 May 30 17:42:16 [ 1046.579491] NOHZ: local_softirq_pending 08 May 30 17:42:16 [ 1047.230344] NOHZ: local_softirq_pending 08 May 30 17:42:33 [ 1063.751879] NOHZ: local_softirq_pending 08 May 30 17:42:33 [ 1063.796340] NOHZ: local_softirq_pending 08 May 30 17:43:00 [ 1090.776493] NOHZ: local_softirq_pending 08 May 30 17:43:00 [ 1090.836544] NOHZ: local_softirq_pending 08 May 30 17:43:00 [ 1090.880271] NOHZ: local_softirq_pending 08 May 30 17:43:04 [ 1095.291939] NOHZ: local_softirq_pending 08 May 30 17:43:04 [ 1095.335659] NOHZ: local_softirq_pending 08 According to git, you ratelimited this back in 2007 with the message "until we found the root cause of that problem." Is this an old problem that has returned ? Maybe interesting note: Both machines I see this on regularly are Atom cpus, and it's always '08'. Dave