On 06/20/2017 07:00 PM, Andi Kleen wrote: > On Tue, Jun 20, 2017 at 06:34:23PM -0400, Prarit Bhargava wrote: >> >> >> On 06/20/2017 05:33 PM, kan.li...@intel.com wrote: >>> From: Kan Liang <kan.li...@intel.com> >>> >>> 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.
Which ones? > Reproducer is typically some stress workload that turbos very high. So stress the single Turbo Max core? Or any core? P. > > -Andi >
