Assuming each driver is stable and has acceptably low-latency through the
high-priority interrupt paths, could the problem be due to interaction of back-end
low-priority handlers? Or maybe locking within the generic mid-level substrate
(above the driver layer)?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to firstname.lastname@example.org
Please read the FAQ at http://www.tux.org/lkml/