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Date:	Tue, 24 Jul 2007 12:37:48 +0200
From:	Mike Galbraith <efault@....de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: 2.6.23-rc1: BUG_ON in kmap_atomic_prot()

On Tue, 2007-07-24 at 12:01 +0200, Mike Galbraith wrote:
> On Mon, 2007-07-23 at 13:24 -0700, Andrew Morton wrote:
> 
> > You're using DEBUG_PAGEALLOC, but I was not, so I think we can rule that out.
> 
> My box bugged during boot the first time I booted 23-rc1, but nothing
> made it to the console, and I didn't have a serial console running.  I
> didn't have DEBUG_PAGEALLOC or friends set.
> 
> > I haven't worked out where that kmap_atomic() call is coming from yet. 
> > Both traces point up into the page allocator, but I _think_ that's stack
> > gunk.
> 
> I just enabled all debug options, and was just rewarded with the below.

Hm.  I just also experienced filesystem corruption when I tried to send
from that kernel, and it bugged in the process.  My mount table ended up
in /etc/resolv.conf along with some binary goop, making nscd rather
unhappy after reboot.  fsck time.

	.Mike

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