Re: [RFC/PATCH 1/3] SLAB: Add PageSlab checking to ksize()

From: Pekka Enberg
Date: Thu May 22 2008 - 12:14:16 EST

Hi Matt,

On Thu, May 22, 2008 at 6:01 PM, Matt Mackall <mpm@xxxxxxxxxxx> wrote:
> As I've said several times, ksize() on kmem_cache_alloced objects
> -cannot work- on SLOB. Calling ksize() on something returned by
> kmem_cache_alloc is a categorical error.

Well, it's a historical fact that ksize() worked for both kmalloc()
and kmem_cache_alloc() (see the kernedoc comment in mm/slab.c).
However, I think we should just look at getting rid of ksize()
altogether as it's only (ab)used by the nommu code and few call-sites
that open-code krealloc().

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