Messages in this thread | | | From | "David S. Miller" <> | Date | Mon, 7 May 2001 16:04:46 -0700 (PDT) | Subject | Re: [PATCH] zero^H^H^H^Hsingle copy pipe |
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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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