on 29/01/2009 14:55 Ed Schouten said the following: > * Andriy Gapon <[email protected]> wrote: >> INTR_FILTER - what does it do? >> It doesn't seem to be documented anywhere, but seems to affect interrupt >> code. > > Not sure, but I think I was once told that FreeBSD has a `two level' > interrupt handling scheme, where the filter is invoked directly to only > figure out whether the interrupt is spurious or not. After it has been > determined it is not, an interrupt thread is scheduled to handle the > interrupt. > > But as I said, I'm not sure. :-) >
This is true and is documented in bus_setup_intr(9). But INTR_FILTER is a compile-time kernel option. -- Andriy Gapon _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
