Re: slab-alignment-rework.patch in -mc

From: Manfred Spraul
Date: Tue Apr 20 2004 - 12:31:34 EST

Andrea Arcangeli wrote:

On Tue, Apr 20, 2004 at 12:24:23AM -0700, Andrew Morton wrote:

So I do think that we should either make "align=0" translate to "pack them
densely" or do the big sweep across all kmem_cache_create() callsites.


What about this proposal:
SLAB_HWCACHE_ALIGN clear: align to max(sizeof(void*), align).
SLAB_HWCACHE_ALIGN set: align to max(cpu_align(), align).

cpu_align is the cpu cache line size - either runtime or compile time.

Or are there users that want an alignment smaller than sizeof(void*)?

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