Re: [PATCH] use local_t for page statistics

[Andi Kleen]

On Saturday 07 January 2006 03:52, Nick Piggin wrote:

> No. On many load/store architectures there is no good way to do local_t,
> so something like ppc32 or ia64 just uses all atomic operations for

well, they're just broken and need to be fixed to not do that.

Also I bet with some tricks a seqlock like setup could be made to work.

> local_t, and ppc64 uses 3 counters per-cpu thus tripling the cache
> footprint.

and ppc64 has big caches so this also shouldn't be a problem.

-Andi
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