Re: dynamic device question

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 10 Aug 1998 22:40:50 +0100 (BST)


> Is it correct that both PCMCIA and USB have hardware support for signaling
> a monitoring process when an insertion/removal event occurs? (monitor

Yes.

> "monitor" kmod and report to devfsd that a new module/device pair is
> available.

Right now daemons could create devices if notified. Devfs doesnt make any
difference here. The flow in all they dynamic device systems is pretty
similar

Hardware --------IRQ/Msg--------> Kernel
Find new devices
Daemon <------Got This----------- Add it
|
Configure ------syscalls---------> Set up device
|
Go

The important thing is the "configure" aspect needs to be userspace

Alan

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