In message: <[EMAIL PROTECTED]>
Kernel Dev <[EMAIL PROTECTED]> writes:
: Hello All. For a project, I am looking into making the em(4) driver use fast
interrupts. Has someone done this or are there other driver references that
could help me in this?
:
: I understand that the main problems are:
:
: 1. Sharing of interrupts.
: 2. Blocking (memory and mutexes).
:
: Are there any other issues I might have missed?
You can share fast interrupts, but it isn't a good idea...
You can't block in a fast interrupt. You must use spin locks. You
cannot call anything that will sleep in a fast interrupt. Ideally,
you'd not modify anything that isn't covered by your own spin locks,
leaving that for a taskqueue or similar queueing strategy.
Warner
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