Re: [powerpc] Next tree Nov 2 : kernel BUG at mm/mmap.c:2135!

David Gibson wrote:

On Wed, Nov 04, 2009 at 06:08:44PM +0530, Sachin Sant wrote:
  

quoted

Sachin Sant wrote:
    

quoted

Today's next tree failed to boot on a POWER 6 box with :

------------[ cut here ]------------
kernel BUG at mm/mmap.c:2135!
Oops: Exception in kernel mode, sig: 5 [#2]
SMP NR_CPUS=1024 NUMA pSeries
      

Problem exists with today's next as well.

Likely cause for this problem seems to the following commit.
If i revert this patch the machine boots fine.

commit a0668cdc154e54bf0c85182e0535eea237d53146
powerpc/mm: Cleanup management of kmem_caches for pagetables
    

Ugh.  Ok, it's not at all obvious how my patch could cause this bug.
Can you send your .config?
  

Attached here is the config.

Thanks
-Sachin


-- 

---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------