Brian Gerst wrote:
>
> Perhaps, but it currently is already allocating 128 bytes for smaller
> caches, because the cache is created with SLAB_HWCACHE_ALIGN. So we
> ended up with redundantly sized caches.
>
linux/mm/slab.c:
> if (flags & SLAB_HWCACHE_ALIGN) {
> /* Need to adjust size so that objs are cache aligned. */
> /* Small obj size, can get at least two per cache line. */
> while (size < align/2)
> align /= 2;
> size = (size+align-1)&(~(align-1));
> }
>
>
HWALIGN is just a hint, the implementation ignores it if it results in
unreasonable wasting of memory.
--
Manfred
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This archive was generated by hypermail 2b29 : Sun Mar 23 2003 - 22:00:45 EST