Re: [POLL] SLAB : Are the 32 and 192 bytes caches really usefull on x86_64 machines ?

Pekka Enberg
2006-01-02T08:37:34Z

On 12/28/05, Andreas Kleen <ak@suse.de> wrote:
> I remember the original slab paper from Bonwick actually mentioned that
> power of two slabs are the worst choice for a malloc - but for some reason Linux
> chose them anyways.

Power of two sizes are bad because memory accesses tend to concentrate
on the same cache lines but slab coloring should take care of that. So
I don't think there's a problem with using power of twos for kmalloc()
caches.

Pekka