Re: [patch 2/2] slab: always consider arch mandated alignment

From: Manfred Spraul
Date: Wed Jul 26 2006 - 14:06:21 EST

Pekka J Enberg wrote:

On Wed, 26 Jul 2006, Heiko Carstens wrote:

We only specify ARCH_KMALLOC_MINALIGN, since that aligns only the kmalloc
caches, but it doesn't disable debugging on other caches that are created
via kmem_cache_create() where an alignment of e.g. 0 is specified.

The point of the first patch is: why should the slab cache be allowed to chose
an aligment that is less than what the caller specified? This does very likely
break things.

Ah, yes, you are absolutely right. We need to respect caller mandated alignment too. How about this?

Good catch - I obviously never tested the code for an HWCACHE_ALIGN cache...


[PATCH] slab: respect architecture and caller mandated alignment

Ensure cache alignment is always at minimum what the architecture or caller mandates even if slab debugging is enabled.

Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>

Signed-off-by: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>

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