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SubjectRe: slab: avoid linear search in kmalloc? (GCC Guru wanted :)
Momchil Velikov wrote:
>
> >>>>> "Bernd" == Bernd Eckenfels <ecki@lina.inka.de> writes:
>
> Bernd> Hello,
> Bernd> I noticed that kmalloc and kmem_find_general_cachep are doing a linear
> Bernd> search in the cache_sizes array. Isnt it better to speed that up by doing a
> Bernd> binary search or a b-tree if like the following patch?
>
> Here is a patch using a gcc extension. gcc generates binary search for the case.

the big "case" statement makes you wonder if ffz(~size) would do the
same ;)
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