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SubjectRe: kqueue, kevent - kernel event notification mechanism
> are there any plans to implement the kqueue, kevent system calls
> in the linux kernel?

Not that I know of

> It would be good for linux to implement event-driven i/o, if not
> by means of kqueue/kevent (BSD-ish interface) then at least in
> some other way.

The standards way is asynchronous io (aio_* interfaces). That is being
worked on

> the difference. The current i/o calls, select and poll, scan all
> open file descriptors for events, every call. This is clearly
> not scalable. Event driven means that the kernel never scans

The API isnt directly the problem. In fact you can make a fine scalable select
by implementing

as multiple calls giving basically the same interface that apps expected
anyway. Take a look at the various /dev/poll experimental interfaces and
bits of code.

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