Messages in this thread |  | | Subject | Re: Is it useful to support user level drivers | Date | Thu, 21 Jun 2001 18:27:14 +0100 (BST) | From | Alan Cox <> |
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> (i.e. counted). An alternative to queuing (user selectable) is to block > interrupt generation at hardware level in kernel space immediately > before notification. > > I'm missing something?
IRQ 9 shared between user space app and disk. IRQ arrives is disabled and reported, app wakes up, app wants to page in code, IRQ is disabled, box dies
You have to handle that in kernel space, at least enough to handle the irq event, ack it and queue the data
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