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Date: Thu, 20 Nov 2008 21:24:37 +0300
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>, LKML <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@linux-foundation.org>
Subject: Re: mm: slab - __cache_alloc NULL prefetch fix
Message-ID: <20081120182437.GA22100@localhost>
References: <20081120164400.GC7363@localhost> <20081120170148.GD7363@localhost> <Pine.LNX.4.64.0811201216110.23154@quilx.com>
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[Christoph Lameter - Thu, Nov 20, 2008 at 12:16:28PM -0600]
| On Thu, 20 Nov 2008, Cyrill Gorcunov wrote:
| 
| > even having prefetch(NULL) as valid we do check if
| > object is not NULL anyway so I thought there is no
| > need to prefetch(NULL) in case of fail.
| 
| The object is only checked if SLAB_DEBUG is on.
| 

My fault Christoph, I've been messed by kmemcheck_slab_alloc
which in turn actually becomes zero function if not tuned on.
So -- all is fine, sorry for noise.

		- Cyrill -