On Tue, Jun 20, 2017 at 06:34:23PM -0400, Prarit Bhargava wrote: > > > On 06/20/2017 05:33 PM, kan.liang@xxxxxxxxx wrote: > > From: Kan Liang <Kan.liang@xxxxxxxxx> > > > > Some users reported spurious NMI watchdog timeouts. > > > > We now have more and more systems where the Turbo range is wide enough > > that the NMI watchdog expires faster than the soft watchdog timer that > > updates the interrupt tick the NMI watchdog relies on. > > > > Hmm ... odd that I haven't seen this. We're running a pretty wide > variety of systems here. Do you have a reproducer? I'd like to see > this occur on production HW. It only happens on a few specific CPU SKUs with a very wide Turbo range. Reproducer is typically some stress workload that turbos very high. -Andi