Re: [PATCH 09/10] x86-32: use SSE for atomic64_read/set if available

[Luca Barbieri]

> One heavy user is set_64() in the pagetable code.  That's already in an
> expensive operation due to the page fault so the impact will be quite low,
> probably.
It currently does not use the atomic64_t infrastructure and thus won't
be affected currently, but can very easily be converted to cast the
pointer to atomic64_t* and use atomic64_set.

I think we set ptes in other places than the page fault handler.
Is any of them performance critical?
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