From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753150AbaHTUcC (ORCPT ); Wed, 20 Aug 2014 16:32:02 -0400 Received: from mail-we0-f182.google.com ([74.125.82.182]:45735 "EHLO mail-we0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752612AbaHTUcA (ORCPT ); Wed, 20 Aug 2014 16:32:00 -0400 From: Catalin Iacob To: Frederic Weisbecker Cc: Dave Jones , Peter Zijlstra , Linux Kernel , Catalin Iacob Subject: Re: nohz fail (was: perf related boot hang.) Date: Wed, 20 Aug 2014 22:31:31 +0200 Message-Id: <1408566691-3023-1-git-send-email-iacobcatalin@gmail.com> X-Mailer: git-send-email 1.8.4.5 In-Reply-To: <20140811200931.GA18865@redhat.com> References: <20140811200931.GA18865@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've also just hit what seems to be the same panic in 3.17-rc1 (ignore the 1 local patch, it's an unrelated change in a comment) twice in less than 1 hour. Hitting this twice in a short amount of time seems to be proof that the 3.17 merge window made it trigger more often. Both times I was running a grep over a Firefox build tree which was taking a long time. The stacktraces are slightly different but both have the "cancel timer from a timer, followed by nmi" pattern. Pictures of the 2 stacktraces: https://drive.google.com/file/d/0B_fRjDygGZSNY0RIc2dyYTExTjg/edit?usp=sharing https://drive.google.com/file/d/0B_fRjDygGZSNS1pSWFkteURrOTQ/edit?usp=sharing