Messages in this thread | | | Subject | Re: [PATCH v2] NMI: fix NMI period is not correct when cpu frequency changes issue. | From | Peter Zijlstra <> | Date | Mon, 22 Apr 2013 22:37:36 +0200 |
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On Mon, 2013-04-22 at 00:50 +0000, Pan, Zhenjie wrote: > This make watchdog reset happen before hard lockup detect.
Doesn't your watchdog trigger an NMI you can use to print the panic?
ISTR some people (hi Don!) spending quite a lot of time to make this work for some other platforms.
IIRC those things would fire an NMI at some point and then hard-reset the machine not much later.. the difficulty was detecting this 'unclaimed' nmi and allowing drivers to register for it.
NMI_UNKNOWN and unknown_nmi_panic are the result of that.
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