Re: [patch v3]numa: add a sysctl to control interleave allocationgranularity from each node to improve I/O performance

[Andi Kleen]

On Mon, Dec 12, 2011 at 09:58:45AM +0800, Shaohua Li wrote:
> If mem plicy is interleaves, we will allocated pages from nodes in a round
> robin way. This surely can do interleave fairly, but not optimal.
> 
> Say the pages will be used for I/O later. Interleave allocation for two pages
> are allocated from two nodes, so the pages are not physically continuous. Later

I would prefer to add a new policy (INTERLEAVE_MULTI or so) for this
instead of a global sysctl, that takes the additional parameter.

Also I don't like having more per task state. Could you compute this
from the address instead even for the process policy case?

-Andi
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