From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Daniel Phillips <phillips@google.com>,
linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH] add __GFP_ZERP to GFP_LEVEL_MASK
Date: Mon, 23 Jul 2007 15:13:06 -0700 [thread overview]
Message-ID: <20070723151306.86e3e0ce.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070723144323.1ac34b16@schroedinger.engr.sgi.com>
On Mon, 23 Jul 2007 14:43:23 -0700
Christoph Lameter <clameter@sgi.com> wrote:
> __GFP_ZERO is implemented by the slab allocators (the page allocator
> has no knowledge about the length of the object to be zeroed). The slab
> allocators do not pass __GFP_ZERO to the page allocator.
OK, well that was weird. So
kmalloc(42, GFP_KERNEL|__GFP_ZERO);
duplicates
kzalloc(42, GFP_KERNEL);
Why do it both ways?
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next prev parent reply other threads:[~2007-07-23 22:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-23 10:03 Peter Zijlstra
2007-07-23 11:21 ` Mel Gorman
2007-07-23 11:38 ` [PATCH] add __GFP_ZERO " Peter Zijlstra
2007-07-23 12:30 ` Mel Gorman
2007-07-23 23:17 ` Christoph Lameter
2007-07-24 6:01 ` Peter Zijlstra
2007-07-24 6:48 ` Peter Zijlstra
2007-07-24 7:14 ` Christoph Lameter
2007-07-24 7:09 ` Christoph Lameter
2007-07-24 7:24 ` Peter Zijlstra
2007-07-24 7:35 ` Christoph Lameter
2007-07-24 19:07 ` Christoph Lameter
2007-07-24 19:25 ` Andrew Morton
2007-07-24 19:36 ` Christoph Lameter
2007-07-24 22:10 ` Andrew Morton
2007-07-24 23:00 ` Christoph Lameter
2007-07-24 23:12 ` Andrew Morton
2007-07-24 23:58 ` Christoph Lameter
2007-07-25 0:06 ` Andrew Morton
2007-07-25 13:06 ` Mel Gorman
2007-07-23 18:37 ` [PATCH] add __GFP_ZERP " Andrew Morton
2007-07-23 18:40 ` Peter Zijlstra
2007-07-23 21:43 ` Christoph Lameter
2007-07-23 22:13 ` Andrew Morton [this message]
2007-07-23 22:41 ` Linus Torvalds
2007-07-23 22:56 ` Andrew Morton
2007-07-23 23:00 ` Christoph Lameter
2007-07-23 22:50 ` Christoph Lameter
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