From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [PATCHv2 -rt 3.10.x] mce: don't try to wake thread before it exists. Date: Tue, 17 Feb 2015 11:00:53 +0100 Message-ID: <20150217100053.GF26177@linutronix.de> References: <20140826190703.57a93cf7@gandalf.local.home> <1409844567-21413-1-git-send-email-paul.gortmaker@windriver.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: Steven Rostedt , linux-rt-users@vger.kernel.org To: Paul Gortmaker Return-path: Received: from www.linutronix.de ([62.245.132.108]:42997 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754786AbbBQKA6 (ORCPT ); Tue, 17 Feb 2015 05:00:58 -0500 Content-Disposition: inline In-Reply-To: <1409844567-21413-1-git-send-email-paul.gortmaker@windriver.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: * Paul Gortmaker | 2014-09-04 11:29:27 [-0400]: >If a broken machine with issues raises an MCE irq event real >early in the boot, it can try and wake the -rt specific handler >thread (mce_notify_helper) before it exists. (It is created >through a device_initcall that happens later in the boot.) When >this happens, we see the irq, which calls the wake with a null >pointer, which then panics the machine at boot. applied. Sebastian