From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757265Ab0GNPMm (ORCPT ); Wed, 14 Jul 2010 11:12:42 -0400 Received: from verein.lst.de ([213.95.11.210]:48810 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753059Ab0GNPMk (ORCPT ); Wed, 14 Jul 2010 11:12:40 -0400 Date: Wed, 14 Jul 2010 17:12:15 +0200 From: Christoph Hellwig To: Ingo Molnar Cc: Christoph Hellwig , mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, linux-tip-commits@vger.kernel.org, rostedt@goodmis.org Subject: Re: [tip:x86/irq] x86: Always use irq stacks Message-ID: <20100714151215.GA31825@lst.de> References: <20100628121554.GA6605@lst.de> <20100630074434.GA25509@elte.hu> <20100630075212.GA24658@lst.de> <20100630075818.GB25509@elte.hu> <20100630080453.GA14371@elte.hu> <20100708204251.GA13569@elte.hu> <20100708205302.GA23961@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100708205302.GA23961@lst.de> User-Agent: Mutt/1.3.28i X-Spam-Score: 0 () UPPERCASE_25_50 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Turns out this wasn't a regression introduced by a commit, but it happens when CONFIG_FUNCTION_GRAPH_TRACER is enabled. From a quick look I have no idea why these would interact badly, especially as CONFIG_FUNCTION_GRAPH_TRACER works fine with irq stacks if the CONFIG_4KSTACKS options is set.