Re: Async user space notification from kernel?
Jens Axboe (axboe@image.dk)
Fri, 27 Aug 1999 00:02:33 +0200
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 <axboe@image.dk>
* Linux CD-ROM Maintainer
* http://www.kernel.dk
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