Re: page migration patchset

[Ray Bryant]

Steve Longerbeam wrote:


> isn't this already taken care of? read_swap_cache_async() is given
> a vma, and passes it to alloc_page_vma(). So if you have earlier
> changed the policy for that vma, the new policy will be used
> when allocating the page during the swap in.
>
> Steve

What if the policy associated with a vma is the default policy?
Then the page will be swapped in on the node that took the page
fault -- this is >>probably<< correct in most cases, but if a
page is accessed from several nodes, and predominately accessed
from a particular node, it can end up moving due to being swapped
out, and that is probably not what the application intended.

--
Best Regards,
Ray
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                  Ray Bryant
512-453-9679 (work)         512-507-7807 (cell)
raybry@xxxxxxx             raybry@xxxxxxxxxxxxx
The box said: "Requires Windows 98 or better",
           so I installed Linux.
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