Messages in this thread | | | Subject | Re: [RFC] New Driver Model for 2.5 | Date | Tue, 23 Oct 2001 21:54:23 +0100 (BST) | From | Alan Cox <> |
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> >"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.
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