On correct hardware it doesnt seem to oops.
> Also, we don't want this data to arrive late or whatever.
> fast_copy_page must copy page (make it so that memcpy()==0).
> If it does not, it is too much "optimized".
See the "sfence" instruction
> A better way to do it is to bencmark several routines at
> startup time and pick the best one. It is done now
> for RAID xor'ing routine.
Not in this case. It is Athlon specific code. It was fine tuned when it
was written
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