Hi, Maciej W. Rozycki wrote: > something CPU-intensive, like: > and observe the NMI counter ticking every second. Ah, thanks for explanations! Indeed it works as you say. Very usefull info, perhaps worth being added to documentation? So if you ACK the attached patch, I ask Andrew to please apply it. Andrew, the attached patch adds the information about the NMI watchdog frequency caveats to the Documentation/nmi_watchdog.txt Unless there are any objections, please apply.