From: "Pekka Enberg" <penberg@cs.helsinki.fi>
To: "Linus Torvalds" <torvalds@linux-foundation.org>
Cc: "Christoph Lameter" <clameter@sgi.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, jeremy@goop.org
Subject: Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)
Date: Mon, 4 Jun 2007 19:37:01 +0300 [thread overview]
Message-ID: <84144f020706040937xb06535em543fa887ad65ee8f@mail.gmail.com> (raw)
In-Reply-To: <alpine.LFD.0.98.0706040924070.23741@woody.linux-foundation.org>
On 6/4/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> Well, the red-zones won't catch readers, and more importantly, even for
> writers they are *really* inconvenient, because it will just tell you
> something bad happened, it won't tell you *where* it happened.
True.
On 6/4/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> Since comparing the addresses of two zero-sized allocations is insane and
> not done _anyway_, it's just much better to return an invalid address.
Then we might as well return your regular NULL pointer for zero-length
allocations as you can't do anything sane with ZERO_SIZE_PTR either.
next prev parent reply other threads:[~2007-06-04 16:37 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-02 1:37 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 [this message]
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
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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