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    SubjectRe: Async user space notification from kernel?
    On Thu, Aug 26 1999, Erik Andersen wrote:
    > > I still wonder if this is because 'read' is the only proc operation that
    > > is filled in... All of the net routines share
    > > 'proc_net_inode_operations'.
    > >
    > > Jeff
    > Ok, I follow you now -- select(2) depends on certain fs file
    > operations that no /proc entries currently provide. By adjusting the
    > file_operations, and providing some needed magic, I could indeed use
    > select on a /proc entry to get async event notification to user space.
    > That would be a very elegant solution.
    > Any hints as to what file_ops are needed to support select?
    > Clearly read and write are not sufficient. flush? poll?

    Poll in addition to read should be enough, I would say.

    * Jens Axboe <>
    * Linux CD-ROM Maintainer

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