Messages in this thread | | | Date | Wed, 30 Aug 2006 15:08:56 -0700 | From | Greg KH <> | Subject | Re: [RFC] Simple userspace interface for PCI drivers |
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On Wed, Aug 30, 2006 at 05:25:45PM -0400, linux-os (Dick Johnson) wrote: > User mode drivers are NOT good. For them to work, too much stuff > needs to be exposed. Then there is the problem of interrupts. > You are not going to be able to make an interrupt 'thunker' like > you could in the old DOS days. The kernel isn't going to call > user-mode code because nobody is going to provide such a potentially > destructive interface. If you think you can handle hardware interrupt > requests with the poll() interface, you are going to be in a world of > hurt for throughput.
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