Luke Yang wrote:
NOMMU special-casing in page refcounting. As a temporary fix, what I
think should happen is simply for all slab allocations to ask for
__GFP_COMP pages.
Could you check that fixes your problem?
It works. What's your plan to modify nommu mm? I would like to
help. And I am also interested in implementing the "non-power-of-2"
allocator in 2.6.
I'll get it up to date and send it over to you, offline. It
would be great if you could help.
New patch:
Acked-by: Nick Piggin <[email protected]>
I'll write a changelog for you:
***
The earlier patch to consolidate mmu and nommu page allocation
and refcounting by using compound pages for nommu allocations
had a bug: kmalloc slabs who's pages were initially allocated
by a non-__GFP_COMP allocator could be passed into mm/nommu.c
kmalloc allocations which really wanted __GFP_COMP underlying
pages.
Fix that by having nommu pass __GFP_COMP to all higher order
slab allocations
***
Sound OK? Can you do it next time? ;)
--
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