Re: NUMA API for Linux

[Andi Kleen]

On Wed, 7 Apr 2004 16:56:39 -0700
Andrew Morton <akpm@xxxxxxxx> wrote:
 
> If you _do_ use the feature, what is the overhead?  12 bytes for each and
> every vma?  Or just for the vma's which have a non-default policy?

Just for VMAs with a non default policy. Default policy is always NULL

> Your patch takes the CONFIG_NUMA vma from 64 bytes to 68.  It would be nice
> to pull those 4 bytes back somehow.

Eliminate the RB color field or use rb_next() instead of vm_next. First 
alternative is cheaper.

-Andi
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