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    SubjectRe: Address spaces on a i386 - Getting Confused
    > I think unless you are willing to go into the hair the bttv driver
    > does, you're going to need to have the device put it into a kernel
    > buffer and then copy it into user space.

    The bttv is hairy because it maps a lot of vmalloc space using scatter
    gather DMA. If you need 32K for a 3D acceleration buffer then you can
    handle it much more cleanly than the bttv driver. Take a look at the
    sound drivers. They kmalloc a block of memory and mmap it into the user
    space. Thats pretty clean


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