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Date: Sun, 4 Aug 2002 10:42:03 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
X-X-Sender: riel@imladris.surriel.com
To: Linus Torvalds <torvalds@transmeta.com>
cc: Andrew Morton <akpm@zip.com.au>,
       Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>,
       <linux-kernel@vger.kernel.org>
Subject: Re: question on dup_task_struct
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On Sat, 3 Aug 2002, Linus Torvalds wrote:
> On Sat, 3 Aug 2002, Andrew Morton wrote:
> >
> > It's not a 1-order allocation.  I'll go back to sleep now.
>
> According to slabinfo, it's an order-2 allocation at least on SMP-x86,
> which is kind of sad. The object size is 1664 bytes, and the slab code
> decides that putting two of them per page is too wasteful, so it
> apparently puts 9 of them on 4 pages instead.

> So I think it should be just GFP_KERNEL.

Trying a little bit of active defragmentation for 4 and 8-page
allocations should be trivial with rmap.  If you want I could
take a stab at writing this code.

regards,

Rik
-- 
Bravely reimplemented by the knights who say "NIH".

http://www.surriel.com/		http://distro.conectiva.com/

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