Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755189AbYHYLg7 (ORCPT ); Mon, 25 Aug 2008 07:36:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753002AbYHYLgv (ORCPT ); Mon, 25 Aug 2008 07:36:51 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:56628 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753253AbYHYLgu (ORCPT ); Mon, 25 Aug 2008 07:36:50 -0400 From: "Rafael J. Wysocki" To: benh@kernel.crashing.org Subject: Re: 2.6.27-rc4-git1: Reported regressions from 2.6.26 Date: Mon, 25 Aug 2008 13:40:43 +0200 User-Agent: KMail/1.9.9 Cc: Linux Kernel Mailing List , Adrian Bunk , Andrew Morton , Linus Torvalds , Natalie Protasevich , Kernel Testers List References: <1219625301.13162.2.camel@pasglop> In-Reply-To: <1219625301.13162.2.camel@pasglop> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200808251340.44993.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1171 Lines: 29 On Monday, 25 of August 2008, Benjamin Herrenschmidt wrote: > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11414 > > Subject : Random crashes with 2.6.27-rc3 on PPC > > Submitter : Michael Buesch > > Date : 2008-08-23 14:10 (1 days old) > > References : http://marc.info/?l=linux-kernel&m=121950076812616&w=4 > > This appears to be a gcc bug when -fno-omit-stack-pointer is used (which > we mostly don't need on ppc anyway except that another gcc stupidity makes > it mandatory for -pg which ftrace needs). > > We're working on a two fold workaround: removing -fno-omit-stack-pointer > in all the cases where we don't really need it, and for when we do (ie, > CONFIG_FTRACE becaues of -pg), using -mno-sched-epilog which seems to > work around it. > > The root cause in gcc hasn't been fully identified yet. Thanks Ben. I've already dropped it from the list of recent regressions. Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/