> >"Stop accepting new requests" is nontrivial as well, in the general
> >case. New requests that can't be discarded need to be queued
> >somewhere. Whose responsibility is that? Ideally at some point where
> >a queue already exists, possibly in the requester.
>
> Some driver already handle queues. In the case of network driver, just
> stop your network queue and stop accepting incoming packets. If your
> driver is too simple to have queues, a simple semaphore on entry points
> can often be enough. You shouldn't deadlock as you are not supposed to
> re-enter a sleeping driver in step 2.
Stop accepting new requests is not simple. To complete existing requests you
might need an arbitary other module to complete a new request you submit
as part of your shutdown.
Alan
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This archive was generated by hypermail 2b29 : Tue Oct 23 2001 - 21:00:41 EST