linux-kernel - Re: Debugging Thinkpad T430s occasional suspend failure.

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Date:	Mon, 18 Feb 2013 09:41:30 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Dave Jones <davej@...hat.com>, Hugh Dickins <hughd@...gle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Paul McKenney <paul.mckenney@...aro.org>
Subject: Re: Debugging Thinkpad T430s occasional suspend failure.


* H. Peter Anvin <hpa@...or.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
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