linux-kernel - Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

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Date:	Fri, 30 May 2008 00:18:14 -0400
From:	"Mike Frysinger" <vapier.adi@...il.com>
To:	"Christoph Lameter" <clameter@....com>
Cc:	"David Howells" <dhowells@...hat.com>,
	"Pekka J Enberg" <penberg@...helsinki.fi>, mpm@...enic.com,
	lethal@...ux-sh.org, linux-kernel@...r.kernel.org,
	"Bryan Wu" <cooloney@...nel.org>
Subject: Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

On Thu, May 29, 2008 at 5:29 PM, Christoph Lameter wrote:
> On Thu, 29 May 2008, Mike Frysinger wrote:
>> > You should not have to do this. This is the default alignment that also
>> > SLOB needs to follow. We need to align structures correctly for access to
>> > long long's.
>>
>> are you saying that slob is broken ?  i see in mm/slob.c:
>> #ifndef ARCH_KMALLOC_MINALIGN
>> #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long)
>> #endif
>
> It should be long long instead.
>
> SLUB:
>
> #ifndef ARCH_KMALLOC_MINALIGN
> #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)
> #endif
>
> SLAB:
>
> #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)

will you post a patch to do that (and ideally delete all of the
occurrences in asm-*/ where the minalign is defined to 8) ?
-mike
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