echo 0 > /proc/sys/kernel/nmi_watchdog
Or install the latest Jupiter (0.0.50) and it will set it for you when you unplug (and change it back when you apply power). As posted on UF, two systems on battery with WELL UNDER 200 wakeups per second.
Fuduntu 14.9 (64bit)
Completely idle on battery for ~15 minutes.
Asus Eee PC 1015PEM
Fuduntu 14.9 (32bit)
Completely idle on battery (as before)
I don't know that I would call this a kernel regression, as the kernel doesn't dynamically change parameters based on applied power state. That's what you need something like Jupiter for..