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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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