Re: question on dup_task_struct

Rik van Riel (riel@conectiva.com.br)
Sun, 4 Aug 2002 10:42:03 -0300 (BRT)

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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