linux-kernel - Re: [patch] slab: always follow arch requested alignments

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Message-ID: <84144f020607220506l56e0cae6lfb3ec8e23694b966@mail.gmail.com>
Date:	Sat, 22 Jul 2006 15:06:27 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Heiko Carstens" <heiko.carstens@...ibm.com>
Cc:	"Andrew Morton" <akpm@...l.org>,
	"Christoph Lameter" <clameter@....com>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] slab: always follow arch requested alignments

On 7/22/06, Heiko Carstens <heiko.carstens@...ibm.com> 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.
> This will make sure that all slab caches will have at least an
> ARCH_SLAB_MINALIGN alignment.
>
> 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.

Ok, but why?

                                                          Pekka
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