linux-kernel - Re: [PATCH] slab: do not call compound_head() in page_get

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Message-ID: <alpine.LFD.2.02.1207021355211.1916@tux.localdomain>
Date:	Mon, 2 Jul 2012 13:56:03 +0300 (EEST)
From:	Pekka Enberg <penberg@...nel.org>
To:	David Rientjes <rientjes@...gle.com>
cc:	Michel Lespinasse <walken@...gle.com>, linux-mm@...ck.org,
	Christoph Lameter <cl@...ux-foundation.org>,
	Matt Mackall <mpm@...enic.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] slab: do not call compound_head() in page_get_cache()

On Wed, 20 Jun 2012, David Rientjes wrote:

> On Wed, 20 Jun 2012, Michel Lespinasse wrote:
> 
> > page_get_cache() does not need to call compound_head(), as its unique
> > caller virt_to_slab() already makes sure to return a head page.
> > 
> > Additionally, removing the compound_head() call makes page_get_cache()
> > consistent with page_get_slab().
> > 
> > Signed-off-by: Michel Lespinasse <walken@...gle.com>
> 
> Acked-by: David Rientjes <rientjes@...gle.com>

The page_get_cache() helper is no longer used in the slab/next branch of

  git://github.com/penberg/linux.git

			Pekka
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