* David Witbrodt wrote: > Quick question: a quick browse of 'Documentation/nmi_watchdog.txt' > suggests that I should use "nmi_watchdog=1", since I have SMP (CPU = > Athlon 64 X2, with CONFIG_SMP=y). Should I follow your suggestion > later, or follow the recommendation of the 'nmi_watchdog.txt' doc? you could try both, starting with nmi_watchdog=2 - and trying nmi_watchdog=1 if that doesnt work. The problem with nmi_watchdog=1 is that it disables high-res timers. (because it has to - it piggy-backs on the back of a periodic timer interrupt) you might even want to test the NMI watchdog with an intentional user-space hard lockup - with the attached lockupcli.c program. (Warning: if you run it as root it will really lock up your box hard. Run it from a VGA text mode console to see any console messages.) Ingo