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Message-ID: <84144f020806091412q778198cbi57a3a8b061a56f8f@mail.gmail.com>
Date: Tue, 10 Jun 2008 00:12:50 +0300
From: "Pekka Enberg" <penberg@...helsinki.fi>
To: "Andrew Morton" <akpm@...ux-foundation.org>
Cc: "Christoph Lameter" <clameter@....com>, dada1@...mosbay.com,
kosaki.motohiro@...fujitsu.com, nickpiggin@...oo.com.au,
hugh@...itas.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vmallocinfo: Add NUMA informations
On Tue, Jun 10, 2008 at 12:05 AM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> yup. Oh well, it's not a big deal.
>
> Except the inlined
>
> if (n != 0 && size > ULONG_MAX / n)
> return NULL;
>
> is a bit bloaty/inefficient. I expect that it's often the case that
> one of `n' and `size' is not a compile-time constant.
I think it was out-of-line at first but then somebody made it inline
as an optimization...
On Tue, Jun 10, 2008 at 12:05 AM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> otoh, there's one good thing about kcalloc: it actually checks for
> multiplicative overflows, whereas the open-coded version often forgets
> to do that.
Yes. That's why we did kcalloc() in the first place. kzalloc() (aka
akpmalloc) came in much later.
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