From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1756085Ab3BRIlf (ORCPT <rfc822;w@1wt.eu>);
	Mon, 18 Feb 2013 03:41:35 -0500
Received: from mail-ea0-f173.google.com ([209.85.215.173]:57187 "EHLO
	mail-ea0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752792Ab3BRIle (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 18 Feb 2013 03:41:34 -0500
Date: Mon, 18 Feb 2013 09:41:30 +0100
From: Ingo Molnar <mingo@kernel.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Paul McKenney <paulmck@linux.vnet.ibm.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>, Dave Jones <davej@redhat.com>,
        Hugh Dickins <hughd@google.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Paul McKenney <paul.mckenney@linaro.org>
Subject: Re: Debugging Thinkpad T430s occasional suspend failure.
Message-ID: <20130218084130.GB15989@gmail.com>
References: <CA+55aFzmEDriX26Z7oJZg9yssFdCAaYwu6krmrwqfj2TBsxA4w@mail.gmail.com>
 <20130215011503.GA11914@redhat.com>
 <CA+55aFyVE0jyu9uw659ERw5E2DdOhwkQp3gk=gcXP0xrmMh9qA@mail.gmail.com>
 <20130215174435.GA2792@linux.vnet.ibm.com>
 <CA+55aFy8FeGMOnWwkfmyFYyVCw+k1LSVg7BG0tsTNZzqi5EKYg@mail.gmail.com>
 <CA+55aFwHtFeN97E-zW2QKQWH8vu=g29cxevvEnpEnHc8dx7oWA@mail.gmail.com>
 <CA+55aFyXo89LQ0mboxVYB5SJ08D8=Kv0=cqYHAd6-H7nmp=S-w@mail.gmail.com>
 <20130216192554.GB7035@linux.vnet.ibm.com>
 <CA+55aFy821kt0cz=nNB45e0K-hGUfairbTEgNP6E65jkA6bWaA@mail.gmail.com>
 <51215E6C.5090102@zytor.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <51215E6C.5090102@zytor.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


* H. Peter Anvin <hpa@zytor.com> wrote:

> On 02/16/2013 11:46 AM, Linus Torvalds wrote:
> >Adding Peter Anvin to the people, just in case he sees what's wrong
> >with the system call stub generation that keeps excessively old object
> >files around. If it's easy to fix, it might be worth trying to make it
> >ok to switch from i386 to x86-64 and back in the same tree.
> 
> I have not been able to reproduce this; it seems to Just 
> Work[TM].
> 
> The syscall header stuff is definitely not to blame: it 
> doesn't even *see* the CONFIG_ settings; instead they are only 
> used to determine which subset of files to create, but the 
> files themselves are configuration-independent.  This is by 
> design.
> 
> As such, without an actual known to fail test case there isn't 
> much I can do.

I tried (based on the versions given by Paul):

  git checkout v3.7-rc7
  make ARCH=i386 defconfig
  make -j64 bzImage

  git checkout v3.8-rc7
  make ARCH=x86_64 olddefconfig
  make -j64 bzImage

but it built just fine. The build bug might depend on the 
specific config file, or might depend on tooling details?

Thanks,

	Ingo