You don't seem to save/restore the FPU state, so it will be likely
corrupted after your copy runs.
Also I'm pretty sure that using movntq (= forcing destination out of
cache) is not a good strategy for generic copy_from_user(). It may
be a win for the copies in write ( user space -> page cache ), but
will hurt for all the ioctls and other things that actually need the
data in cache afterwards. I am afraid it is not enough to do micro benchmarks
here.
-Andi
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This archive was generated by hypermail 2b29 : Sat Nov 23 2002 - 22:00:17 EST