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    SubjectRe: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains
    Hi,

    On Mon, Feb 05, 2001 at 03:19:09PM +0000, Alan Cox wrote:
    > > Yes, it's the sort of thing that you would hope should work, but in
    > > practice it's not reliable.
    >
    > So the less smart devices need to call something like
    >
    > kiovec_align(kiovec, 512);
    >
    > and have it do the bounce buffers ?

    _All_ drivers would have to do that in the degenerate case, because
    none of our drivers can deal with a dma boundary in the middle of a
    sector, and even in those places where the hardware supports it in
    theory, you are still often limited to word-alignment.

    --Stephen

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