From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756230AbZBVRGn (ORCPT ); Sun, 22 Feb 2009 12:06:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754250AbZBVRGf (ORCPT ); Sun, 22 Feb 2009 12:06:35 -0500 Received: from mail-bw0-f167.google.com ([209.85.218.167]:41438 "EHLO mail-bw0-f167.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754185AbZBVRGe (ORCPT ); Sun, 22 Feb 2009 12:06:34 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=xKbciO9AyRFWK8IlCf9jC2pxP+VL4ClZrsaim4lu6oBfFeCfJFnX525L4YpUW8IC+j elNGzckeaQ/023YmymMpRZrANGoEQkZv20DF8umdVgx6nBLy8SqLPMtK5k7lIW+QtJW5 5CdAA+JJzzBoMCCP/olbbzpeVeYv74IcwUkYk= MIME-Version: 1.0 In-Reply-To: <20090222170044.GC6003@nowhere> References: <20090222135739.GA28619@damson.getinternet.no> <20090222164419.GA28442@elte.hu> <20090222170044.GC6003@nowhere> Date: Sun, 22 Feb 2009 18:06:32 +0100 Message-ID: <19f34abd0902220906l73751821u3051cda3542b0518@mail.gmail.com> Subject: Re: [GIT PULL] kmemcheck updates for -tip From: Vegard Nossum To: Frederic Weisbecker Cc: Ingo Molnar , Pekka Enberg , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2009/2/22 Frederic Weisbecker : > BTW, I just tested kmemcheck (without these fixes pulled) and encountered some > troubles with the function graph tracer which hangs during the self tests. > As well as a message from hrtimer which tells its interrupt is too slow. > > Well, I'm pulling latest -tip and will see. Hm, yes. kmemcheck doesn't work well with ftrace -- you'd have to disable tracing (i.e. removing the -pg option to gcc) for at least the x86 page fault handler and the kmemcheck code. I had a patch to fix this a while ago, but it's not very nice to exclude page faults from ftrace. I should make it depend on !FTRACE for now to prevent more head-scratching from others. Thanks for testing! Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036