On Sun, Dec 27, 2009 at 02:33:14PM +0200, Pekka Enberg wrote:

Hi Andi,

On Sun, 2009-12-27 at 13:06 +0100, Andi Kleen wrote:

quoted

Get this on a NFS root system while booting
This must be a recent change in the last week, 
I didn't see it in a post rc1 git* from last week
(I haven't done a exact bisect)

It's triggered by the r8169 driver close function, 
but looks more like a slab problem?

I haven't checked it in detail if the locks are 
really different or just lockdep not knowing 
enough classes.

I broke the lockdep annotations in commit
ce79ddc8e2376a9a93c7d42daf89bfcbb9187e62 ("SLAB: Fix lockdep annotations
for CPU hotplug"). Does this fix things for you? Heiko, the following
patch should fix it for you too.

Works fine here too. Thanks!