Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755557AbZFRDww (ORCPT ); Wed, 17 Jun 2009 23:52:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757618AbZFRDwf (ORCPT ); Wed, 17 Jun 2009 23:52:35 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:52702 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752113AbZFRDwd (ORCPT ); Wed, 17 Jun 2009 23:52:33 -0400 Date: Wed, 17 Jun 2009 23:52:27 -0400 (EDT) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: Jake Edge cc: LKML , Ingo Molnar , Frederic Weisbecker Subject: Re: problem with function_graph self-test? In-Reply-To: <20090617214303.483fe0a0@chukar> Message-ID: References: <20090616122603.6a628097@chukar> <20090617214303.483fe0a0@chukar> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1337 Lines: 35 On Wed, 17 Jun 2009, Jake Edge wrote: > On Wed, 17 Jun 2009 23:24:18 -0400 (EDT) Steven Rostedt wrote: > > > Jake, when you find a bug, you really find a bug! > > heh, glad to be of service :) > > > This is something that gcc is screwing with us. After spending all > > day today trying to figure out what is happening, I finally found it > > in the assembly. > > is there something specific to my config that causes this to happen? I > assume other folks are running the function_graph selftest under other, > quite possibly more sane, configs without running into it ... or is it > just something that most folks aren't running (i can't remember why i > turned ftrace selftests on, other than, perhaps, general curiosity) ... > > you don't run into this under your "normal" configs? I don't think it has anything to do with the config, it looks to be some functions may do this wacky thing with the stack. If it does, and is executed, then it will crash like this. I think it has more to do with the latest gcc. I tried an older gcc and it did not cause this issue. -- Steve -- 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/