On Tuesday, January 22, 2013 5:40:55 pm Sushanth Rai wrote: > Hi, > > Does freebsd have some functionality similar to Linux's NMI watchdog ? I'm aware of ichwd driver, but that depends to WDT to be available in the hardware. Even when it is available, BIOS needs to support a mechanism to trigger a OS level recovery to get any useful information when system is really wedged (with interrupt disabled). > > With Linux's NMI, APIC is programmed to periodically generate NMI and the OS NMI handler can check for some counters and invoke panic if the counters are not updated for a while.
We currently use the local APIC timer as a timer with a normal interrupt. There's no reason you couldn't add a mode to make the local APIC timer operate in this fashion however. -- John Baldwin _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
