Re: 3.6.11: khubd issue SLAB related?

[David Rientjes]

On Fri, 8 Mar 2013, Udo van den Heuvel wrote:

> [3663200.799579] SLAB: Unable to allocate memory on node 0 (gfp=0xd0)
> [3663200.799581]   cache: size-65536, object size: 65536, order: 4
> [3663200.799583]   node 0: slabs: 6/6, objs: 6/6, free: 0
> [3663200.799585] pwc: Oops, could not allocate memory for pwc_device.

You have memory freed, but like your earlier page allocation failure on 
mount, it is too fragmented.  This is an order-4 page allocation, the 
kmalloc() of struct pwc_device, and you don't even have any order-3 pages 
that are available.  Are you running with CONFIG_COMPACTION enabled?

If not, enable it and try again, or get root and manually try to 
defragment memory by doing echo 1 > /proc/sys/vm/compact_memory.

If so, try killing a memory hogging process to free some memory and 
attempt to get some higher order pages available.
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