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:

quoted

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.

quoted

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