Messages in this thread | | | Date | Sun, 23 Mar 2003 22:20:42 +0100 | From | Manfred Spraul <> | Subject | Re: [PATCH] slab.c cleanup |
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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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