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

[Andi Kleen]

> memcpy/memset/etc. (assuming SSE is the best option for these at least
> on some processors) and checksums come to mind.

Typically SSE advantages only come to play with very large data sets,
and the kernel's are not big enough. I tried it some time ago.

That said you can already use kernel_fpu_begin/end of course
and it's used in some very rare cases.

> Also non-temporal SSE moves might be useful for things like memory
> compaction without clobbering caches.

You don't need SSE for non temporal moves.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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