From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Christoph Lameter <clameter@sgi.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)
Date: Mon, 04 Jun 2007 09:32:43 -0700 [thread overview]
Message-ID: <46643EAB.7070705@goop.org> (raw)
In-Reply-To: <alpine.LFD.0.98.0706040924070.23741@woody.linux-foundation.org>
Linus Torvalds wrote:
> The thing is, why *should* we care about comparing addresses? We'll give
> the right result (you got many perfectly separate allocations, they're
> just zero bytes apart, exactly like you asked for!). The fact that C++ has
> some semantics for it is not a good argument - C++ is a broken language,
> and it's not the language we use for the kernel anyway.
C too, but I really honestly can't think of a scenario - realistic or
contrived - in which you'd end up doing a zero-sized allocation and care
that its address has been aliased. But we'll find out when we do it ;)
J
next prev parent reply other threads:[~2007-06-04 16:33 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 [this message]
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
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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