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    SubjectRe: Make pipe data structure be a circular list of pages, rather than


    On Fri, 7 Jan 2005, Alan Cox wrote:
    >
    > That would break stuff, but holding the last page until it fills 4K
    > would work, or just basic sg coalescing when possible. The pipe
    > behaviour - particularly size and size of atomic writes is defined by
    > SuS and there are people who use pipes two ways between apps and use the
    > guarantees to avoid deadlocks

    Hmm.. Are there really any other guarantees than the atomicity guarantee
    for a PIPE_BUF transfer? I don't see any in SuS..

    That said, existing practice obviously always trumps paper standards, and
    yes, coalescing is possible.

    Linus
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