linux-kernel - Re: [PATCH -mm] add a kmem

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Date:	Wed, 20 Jun 2007 00:14:41 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Christoph Lameter" <clameter@....com>
Cc:	"Christoph Hellwig" <hch@...radead.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Cedric Le Goater" <clg@...ibm.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Herbert Poetzl" <herbert@...hfloor.at>,
	"Pavel Emelianov" <xemul@...nvz.org>
Subject: Re: [PATCH -mm] add a kmem_cache for nsproxy objects

Hi Christoph x 2,

On Tue, 19 Jun 2007, Christoph Hellwig wrote:
> > Hmm, I must have missed the macro going in.  Frankly speaking I plain hate
> > it.  It's a rather useless obsfucation.

I hate the name, but the macro is far from useless.

On 6/19/07, Christoph Lameter <clameter@....com> wrote:
> It makes the code easier to review and reduces errors by establishing a
> standard way of defining a slab with minimal effort. You can
> still do the  old style and create the kmem_cache_create parameter
> monsters that span lots of lines.
>
> KMEM_CACHE can do it just by specifying two parameters.

Yes and if you look at existing callers of kmem_cache_create(), you'll
notice that most of them work _exactly_ the way the macro does. Most
of the time you want to use default alignment and not define a
constructor.
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