usb with fast interrupts

[Robert Watson]

On Fri, 12 Nov 2004, M. Warner Losh wrote:

> In message: <Pine.NEB.3.96L.1041112214636.26498B-100000 at fledge.watson.org>
>             Robert Watson <rwatson at freebsd.org> writes:
> : 
> : On Fri, 12 Nov 2004, M. Warner Losh wrote:
> : 
> : > Our usb system supports soft interrupts, but we currently don't make
> : > productive use of them.  The following makes interrupts fast interrupts
> : > and uses taskqueues to queue data to a SWI. 
> : 
> : It looks like INTR_FAST is spelt as INTR_MPSAFE in your patch.  Did you
> : mean instead to spell it INTR_FAST?
> 
> Actually, I ment what the patch said, but the description was incorrect. 
> It should have just said MPSAFE interrupts, not FAST interrupts. 

Sounds good to me.  Scott's comments on possibly wanting a non-task worker
may well be valid, though.  Or you can do what acpi and other components
do: use the task queue mechanism but provide their own kernel thread.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org      Principal Research Scientist, McAfee Research