linux-kernel - Re: slab allocators: Remove obsolete SLAB_MUST_HWCACHE

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Message-ID: <20070417230955.GG11166@waste.org>
Date:	Tue, 17 Apr 2007 18:09:55 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Christoph Lameter <clameter@....com>
Cc:	akpm@...ux-foundation.com, linux-kernel@...r.kernel.org
Subject: Re: slab allocators: Remove obsolete SLAB_MUST_HWCACHE_ALIGN

On Mon, Apr 16, 2007 at 10:35:21PM -0700, Christoph Lameter wrote:
> The flag SLAB_MUST_HWCACHE_ALIGN is
> 
> 1. Never checked by SLAB at all.
> 
> 2. A duplicate of SLAB_HWCACHE_ALIGN for SLUB
> 
> 3. Fulfills the role of SLAB_HWCACHE_ALIGN for SLOB.
> 
> The only remaining use is in sparc64 and ppc64 and their use there
> reflects some earlier role that the slab flag once may have had. If
> its specified then SLAB_HWCACHE_ALIGN is also specified.
> 
> The flag is confusing, inconsistent and has no purpose.
> 
> Remove it.

Hmm, at one point this was needed by SLOB to boot on x86, I wonder
when that changed? But if SLAB is using the other define now, I'm
happy to switch.
 
> Signed-off-by: Christoph Lameter <clameter@....com>

Signed-off-by: Matt Mackall <mpm@...enic.com>
-- 
Mathematics is the supreme nostalgia of our time.
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