is magic-sysrq handling threaded in linux-RT?

[Chris Friesen <chris.friesen@xxxxxxxxxxxxx>]

I'm trying to debug an issue on a kernel with the RT patches, and it's 
causing a hang where magic-sysrq does not work.

I'd like to clarify something though...is the serial console interrupt 
threaded?  If it is, then something that prevents the scheduler from 
running could result in magic-sysrq not functioning, but if it isn't 
then I think that would point to an interrupt problem.

Anyone know for sure?

Thanks,
Chris