INTR_FAST

[Hans Petter Selasky]

On 2020-08-27 15:50, Kamal R. Prasad wrote:
> "These interrupt handlers are currently misnamed “fast” interrupt handlers
> since the INTR_FAST flag used in earlier versions of the kernel is used to
> mark these handlers. The only interrupts which currently use these types of
> interrupt handlers are clock interrupts and serial I/O device interrupts."
> 
> I want to use INTR_FAST for my spi controller, but i find that it is not
> defined on freebsd stable11. Is INTR_EXCL related in any way to INTR_FAST?
> if not, how do I setup a fast interrupt handler?

Hi,

When you setup and interrupt, there are two function pointers.

One is the so-called interrupt filter, which is running in the fast 
context, and the other is the regular interrupt handler which is running 
from a thread context.

--HPS