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    SubjectRe: Unifying epoll,aio,futexes etc. (What I really want from epoll)
    Mark Mielke wrote:
    > On Thu, Oct 31, 2002 at 11:02:15PM +0000, Jamie Lokier wrote:
    > > The semantics for this are a bit confusing and inconsistent with
    > > poll(). User gets POLL_RDNORM event which means something in the
    > > directory has changed, not that the directory is now readable or that
    > > poll() would return POLL_RDNORM. It really should be a different
    > > flag, made for the purpose.
    >
    > Don't be encouraging any of us to expect the ability to poll() for changes
    > to regular files (log file parsers that sit on EOF periodically polling for
    > further data...).

    Actually you can already do something similar, if a little coarse
    grained, in 2.4 kernels using dnotify on the parent directory.

    > Just get *something* decent out so that we can play with it in a
    > production environment. I would put off extensions such as this
    > until the API is well established.

    "something decent" is already out - epoll is quite useful in its
    present form. (Take that with a grain of salt - I haven't tried it,
    and it only just went into 2.4.45, and I have the impression Davide is
    cleaning up the code for 2.4.46 - but it looks basically ok).

    -- Jamie
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