From: Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH] Export symbol ksize()
Date: Mon, 16 Feb 2009 19:29:59 +0200
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Cc: Johannes Weiner <hannes@cmpxchg.org>, "Kirill A. Shutemov" <kirill@shutemov.name>,
	Christoph Lameter <cl@linux-foundation.org>, Matt Mackall <mpm@selenic.com>, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, linux-crypto@vger.kernel.org,
	Herbert Xu <herbert@gondor.apana.org.au>, Geert.Uytterhoeven@sonycom.com
To: Joe Perches <joe@perches.com>
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On Mon, 2009-02-16 at 14:56 +0100, Johannes Weiner wrote:
>> One problem is that zeroing ksize()
>> bytes can have an overhead of nearly twice the actual allocation size.

On Mon, Feb 16, 2009 at 6:32 PM, Joe Perches <joe@perches.com> wrote:
> A possible good thing is when linux has a
> mechanism to use known zeroed memory in
> kzalloc or kcalloc, it's already good to go.

Hmm, kzfree() is not going to be all that common operation so there
won't be that many known zeroed regions and I suspect tracking them
will have more overhead than just doing the memset().

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