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    SubjectRe: PATCH: Raw device IO for 2.1.131
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    alan@lxorguk.ukuu.org.uk said:
    > Similarly scanners really want to be working direct scatter gather to
    > big DMA buffers. Its fairly crazy to then go copying those to user
    > space.

    Yes, Yes, Yes! Thank you.

    120 Pages/Minute Grayscale at 300DPI is adversely affected by memory copies.
    (NT has similar problems.) However, I coerce Linux into providing the data
    to the user without copying by allocating gobs of memory as a buffer and
    making the application map that memory.
    --
    Steve Williams "The woods are lovely, dark and deep.
    steve@icarus.com But I have promises to keep,
    steve@picturel.com and lines to code before I sleep,
    http://www.picturel.com And lines to code before I sleep."



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