linux-kernel - Re: [PATCH] slub: always align cpu_slab to honor cmpxchg

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Message-ID: <alpine.DEB.2.00.1106030905590.27151@router.home>
Date:	Fri, 3 Jun 2011 09:06:46 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Pekka Enberg <penberg@...nel.org>
cc:	Chris Metcalf <cmetcalf@...era.com>,
	David Rientjes <rientjes@...gle.com>,
	Tejun Heo <tj@...nel.org>, Matt Mackall <mpm@...enic.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] slub: always align cpu_slab to honor cmpxchg_double
 requirement

On Fri, 3 Jun 2011, Pekka Enberg wrote:

> > No, in 2.6.39 the irqsafe_cpu_cmpxchg_double() was guarded under "#ifdef
> > CONFIG_CMPXCHG_LOCAL".  Now it's not.  I suppose we could take the comment
> > change in percpu.h for 2.6.39, but it probably doesn't merit churning the
> > stable tree.
>
> Yup. Looks good. Christoph?

Ok if we do not mind the packing density to be not that tight anymore.

Acked-by: Christoph Lameter <cl@...ux.com>