Messages in this thread | | | Date | Tue, 21 Sep 1999 16:56:44 +0200 | From | Jamie Lokier <> | Subject | Re: Turning lucent winmodem into soundcard (RT-Linux -when?) |
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Pavel Machek wrote: > > Possibly kernel space will be used to enforce certain homologation > > rules, like "can't stay off hook for > X seconds without a signal, or < > > Y seconds". User-space will be involved in _setting_ those parameters, > > then the kernel is responsible for enforcing them should the user-space > > part die for some reason. I'm not sure how necessary that is. > > I do not think this is neccessary. Userland daemon should not die. If > it dies, it closes device, and it is reasonable to hangup on such > event. (Hangup is just the right response - always. That's what > happens when you pull phone out of the socket.)
That seems ok for when the daemon dies. Daemons do die from time to time unfortunately.
What about: we should not remain on hook for more than X hundred milliseconds if over-current is sensed. Not especially difficult to handle, but important? User-space scheduling is not _that_ reliable especially under load.
-- Jamie
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