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    SubjectRe: seq_file and exporting dynamically allocated data
    On Mon, Nov 17, 2003 at 12:48:04AM -0800, William Lee Irwin III wrote:
    > There's a retry loop where the buffer size is doubled each iteration
    > that looks to me like automagic sizing in the code for seq_read(). I
    > can't say I've actually tried to rely on getting more than a page
    > at a time through seq_read(), though.

    Woops. This looks like it only makes sure there's enough to get the
    first ->show() into the buffer; I see that it later gives up when
    m->count == m->size once the first ->show() has enough bufferspace to
    complete later on. So if all ->show() operations to do are less than
    PAGE_SIZE, it'll never hand back more than a page at a time, and may
    hand back short reads prior to EOF, which doesn't bode well for my
    short read == EOF idea (maybe not a great assumption in general).

    -- wli
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