Re: [patch] slab: always follow arch requested alignments
From: Christoph Lameter
Date: Sat Jul 22 2006 - 10:53:52 EST
On Sat, 22 Jul 2006, Heiko Carstens wrote:
> In kmem_cache_create(): always check if BYTES_PER_WORD is less than
> ARCH_SLAB_MINALIGN and disable debug options that would set the
> alignment to BYTES_PER_WORD.
Why disable debug options?
> This will make sure that all slab caches will have at least an
> ARCH_SLAB_MINALIGN alignment.
You can specify alignment at cache creation. Why do we need all slabs to
> In addition make sure that a caller mandated align which is greater
> than BYTES_PER_WORD also disables the same debug options.
> This makes sure that ARCH_KMALLOC_MINALIGN also has an effect if
> CONFIG_DEBUG_SLAB is set.
Is there a particular problem you are trying to address?
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