Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

[David Howells]

Pekka J Enberg <penberg@xxxxxxxxxxxxxx> wrote:

> From: Christoph Lameter <clameter@xxxxxxx>
> 
> As reported by Paul Mundt, kobjsize() does not work properly with SLOB and SLUB
> that re-use parts of struct page for their own purposes. Fix it up by using
> compound_order() for compound pages that don't have PageSlab set.
> 
> Reported-by: Paul Mundt <lethal@xxxxxxxxxxxx>
> Cc: Christoph Lameter <clameter@xxxxxxx>
> Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
> ---
> I kept the original object size calculation for non-compound pages in this 
> version. It looks like the nommu code uses kobjsize() for all sorts of 
> interesting things.

Works for SLAB and SLUB.  SLOB breaks well before getting to anything these
patches affect.

Acked-by: David Howells <dhowells@xxxxxxxxxx>
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