Messages in this thread | | | Subject | Re: [patch] Prefetching file_read_actor() | Date | Tue, 1 Jan 2002 10:29:20 +0000 (GMT) | From | Alan Cox <> |
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> My initial guess is that some of the callers of copy_to_user are > doing something that is harmed the prefetching. > (Maybe they are doing additional prefetch() calls)
Most callers are dealing with cached data, and unless you checked the length in advance to make a sensible decision it will just make things ugly. If you aren't copying 512 bytes+ its probably not worth it.
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