On Tuesday 28 February 2006 02:56, Paul Jackson wrote:
> Hmmm ... your thread with Andi confuses me ...
>
> Oh well.
>
> I take it that Andi is suggesting that there be the option to override
> the tasks mempolicy, in the particular case of these file i/o slab
> caches, with an interleave over the online nodes.
Yep exactly.
> This option would be useful in the case that a system is not using
> cpusets, but still wants to spread out these particular (sometimes
> large) file i/o caches.
Yep.
> Questions for Andi:
>
> 1) Are you content to have such a interleave of these particular file
> i/o slabs triggered by a mm/mempolicy.c option? Or do you think
> we need some sort of task external API to invoke this policy?
Task external. mempolicy.c has no good way to handle multiple policies
like this. I was thinking of a simple sysctl
I guess I can cook up a patch once your code is merged.
> 2) Do you recommend that the page (file buffer) cache also be
> interleavable, across all online nodes, if optionally requested,
> on systems not using cpusets?
Yes, but as a separate option.
-Andi
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