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

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Date:	Wed, 26 Jul 2006 18:43:30 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Christoph Lameter" <clameter@....com>
Cc:	"Heiko Carstens" <heiko.carstens@...ibm.com>,
	"Andrew Morton" <akpm@...l.org>, linux-kernel@...r.kernel.org,
	"Manfred Spraul" <manfred@...orfullife.com>
Subject: Re: Re: [patch] slab: always follow arch requested alignments

Hi Christoph,

On 7/26/06, Christoph Lameter <clameter@....com> wrote:
> We intentionally discard the caller mandated alignment for debugging
> purposes.

Disagreed. The caller mandated alignment is not a hint. It is the
required minimum alignment for objects.

On 7/26/06, Christoph Lameter <clameter@....com> wrote:
> And it changes the basic way that slab debugging works.

Look at kmem_cache_create, we turn off debugging for both caller and
architecture mandated alignments already and the only reason we are
not doing it for Heiko is because the architecture recommended default
alignment is so large.

                                      Pekka
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