Messages in this thread | | | Date | Sat, 10 Aug 2002 18:55:08 +0100 | From | Jamie Lokier <> | Subject | Re: [patch 6/12] hold atomic kmaps across generic_file_read |
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Linus Torvalds wrote: > For people like that, wouldn't it be nice to just be able to tell them: if > you do X, we guarantee that you'll get optimal zero-copy performance for > reading a file.
Don't forget to include the need for mmap(... MAP_ANON ...) prior to the read.
Given the user will need to establish a new mapping anyway, why pussy foot around with subtleties? Just add a MAP_PREFAULT flag to mmap(), which reads the whole file and maps it before returning.
-- Jamie - 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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