Ben LaHaise writes:
> and then use a map_mm_kiobuf (which is
> map_user_kiobuf but with an mm parameter) for the portion of the buffer
> that's currently being copied. That improves code reuse and gives us a
> few primatives that are quite useful elsewhere.
If it has roughly the same cost as Manfred's copy_user thing, it is
therefore roughly equivalent.
If this map_mm_kiobuf() thing would cost more (I think it would
because it would be using kiobufs when for this case there is
absolutely no need for them) then why? "It's a clean interface
everyone can use" is not an acceptable answer when the clean interface
costs significantly more than the straightforward approach.
Later,
David S. Miller
davem@redhat.com
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This archive was generated by hypermail 2b29 : Mon May 07 2001 - 21:00:26 EST