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    SubjectRe: async I/O seems to be blocking on 2.6.15
    Jens Axboe wrote:
    > You could optimistically retry when you had reaped some completed
    > events, or use some controlled way of blocking for free request
    > notification. There are many ways, most of them share the fact that the
    > time between notification and new io_submit() may change the picture, in
    > which case you'd get EAGAIN once more.
    >
    > The important bit is imho to make the blocking at least deterministic.
    > At some point you _have_ to block for resources, but it's not very
    > polite to be blocking for a considerable time indeterministically.
    >

    Right, but there currently exists no mechanism for waiting until there
    is room in the queue is there? My point was that this would be required
    in order to return EAGAIN.

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