linux-kernel - Re: [GIT PULL] SLAB include file dependency fixes + kmemtrace updates

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Date:	Mon, 6 Apr 2009 20:51:00 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Subject: Re: [GIT PULL] SLAB include file dependency fixes + kmemtrace
 updates



On Mon, 6 Apr 2009, Linus Torvalds wrote:
> 
> I'm not sure this is the tree that brings in the problem, but my wife's 
> Mac Mini won't boot any more, and it looks like some slub or percpu issue, 
> so regardless, roughly the right people are involved in the cc here 
> already.
> 
> I get odd NUL page faults or GP faults in either __kmalloc, 
> __kmalloc_track_caller or kmem_cache_alloc

Hmm. Bisected to Andrew's big chunk of merges on April 1st. Right now I 
have

 - bad: 527410ff7fc5d45fe41523c0ba061113dea22017 ("cirrusfb: GD5446 
   fixes")

 - good: 63cd885426872254e82dac2d9e13ea4f720c21dc ("ntfs: remove private 
   wrapper of endian helpers")

and all the commits in between are all from that same -mm series. Very 
interesting. 

Anyway, the SLUB errors and the per-cpu'ness of the thing seems to have 
been a false lead and irrelevant. 

Andrew, I'll continue to bisect. Looks like it might be the epoll changes 
(that's the only really 'core' thing there). Although I don't understand 
why those would make that Mac Mini unhappy, but not affect the other 
machines. So maybe I should just stop guessing until the bisection ends..

			Linus
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