linux-kernel - Re: [GIT PATCH] TTY patches for 2.6.33-git

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Date:	Sat, 12 Dec 2009 11:06:56 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Greg KH <gregkh@...e.de>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PATCH] TTY patches for 2.6.33-git

* Andrew Morton <akpm@...ux-foundation.org> wrote:

> Have a trace.  I'm actually wondering if perhaps there's a missing 
> unlock_kernel() somewhere else, and the tty code is just the victim of 
> that.

Unlikely i'd say. I have 1000+ successful overnight tests on the latest 
tree Linus pushed out:

 3ef884b: Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/d

So that's a guaranteed 'good' kernel.

The moment i merged 053fe57 into -tip the lockups started, so that's a 
guaranteed 'bad' kernel. There's only the TTY changes between those two 
points that look remotely related.

It's spurious though so quite hard to bisect. I tried one bisection 
today already and it got on the wrong track. I'll do a brute-force 
revert of the commits i quoted, lets see what happens.

	Ingo
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