From: Rene Herman <rene.herman@gmail.com>
To: "John Anthony Kazos Jr." <jakj@j-a-k-j.com>
Cc: Christoph Lameter <clameter@sgi.com>,
Andrew Morton <akpm@linux-foundation.org>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)
Date: Tue, 05 Jun 2007 14:54:04 +0200 [thread overview]
Message-ID: <46655CEC.7070900@gmail.com> (raw)
In-Reply-To: <alpine.DEB.0.99.0706050804170.27388@sigma.j-a-k-j.com>
On 06/05/2007 02:07 PM, John Anthony Kazos Jr. wrote:
> The name says exactly what it is. It's not at all dreadful. If we're going
> to return a special value in the zero-size case (and in only that case) as
> a valid pointer instead of actually allocating one byte and treating it as
> zero, what we have is...a zero-size pointer.
No, what we have is a sizeof(pointer) sized pointer pointing to an object of
size zero. ZERO_SIZE_PTR is butt-ugly. With a really ugly butt.
Rene.
next prev parent reply other threads:[~2007-06-05 12:57 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-02 1:37 SLUB: Return ZERO_SIZE_PTR for kmalloc(0) Christoph Lameter
2007-06-02 2:09 ` John Anthony Kazos Jr.
2007-06-02 2:15 ` Christoph Lameter
2007-06-02 2:21 ` John Anthony Kazos Jr.
2007-06-02 2:54 ` Linus Torvalds
2007-06-02 3:06 ` Christoph Lameter
2007-06-02 3:41 ` Andrew Morton
2007-06-02 4:01 ` Christoph Lameter
2007-06-02 4:31 ` Andrew Morton
2007-06-02 4:45 ` Christoph Lameter
2007-06-02 4:54 ` Andrew Morton
2007-06-03 16:17 ` Matt Mackall
2007-06-04 17:59 ` William Lee Irwin III
2007-06-03 16:15 ` Matt Mackall
2007-06-04 14:44 ` Alan Cox
2007-06-04 15:08 ` Pekka Enberg
2007-06-04 16:16 ` Christoph Lameter
2007-06-04 16:22 ` Pekka Enberg
2007-06-04 16:26 ` Linus Torvalds
2007-06-04 16:32 ` Jeremy Fitzhardinge
2007-06-04 16:37 ` Pekka Enberg
2007-06-04 16:38 ` Jeremy Fitzhardinge
2007-06-04 16:43 ` Roland Dreier
2007-06-04 17:02 ` Pekka Enberg
2007-06-04 16:48 ` Linus Torvalds
2007-06-04 18:22 ` Cyrill Gorcunov
2007-06-04 17:20 ` Alan Cox
2007-06-04 17:50 ` Linus Torvalds
2007-06-04 18:05 ` William Lee Irwin III
2007-06-04 18:47 ` Linus Torvalds
2007-06-04 19:01 ` Christoph Lameter
2007-06-04 19:13 ` Pekka Enberg
2007-06-04 19:14 ` Christoph Lameter
2007-06-04 19:25 ` Pekka Enberg
2007-06-04 22:39 ` Christoph Lameter
2007-06-04 22:53 ` Andrew Morton
2007-06-04 23:09 ` Christoph Lameter
2007-06-05 5:27 ` Pekka Enberg
2007-06-05 17:23 ` Christoph Lameter
2007-06-05 8:50 ` Rene Herman
2007-06-05 12:07 ` John Anthony Kazos Jr.
2007-06-05 12:54 ` Rene Herman [this message]
2007-06-05 13:58 ` John Anthony Kazos Jr.
2007-06-05 14:32 ` Rene Herman
2007-06-05 19:07 ` Pekka Enberg
2007-06-05 14:40 ` Jeremy Fitzhardinge
2007-06-05 14:56 ` Rene Herman
2007-06-06 21:26 ` Pavel Machek
2007-06-06 21:58 ` Rene Herman
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