Re: [PATCH RFC] NMI Re-introduce un[set]_nmi_callback
From: Don Zickus
Date: Thu Sep 04 2008 - 13:22:00 EST
On Thu, Sep 04, 2008 at 05:52:17PM +0200, Andi Kleen wrote:
> Then if there's a chipset specific NMI driver it could
> also check if the chipset raised it. That would be a possible
> solution for HP -- they would need to implement such a driver
> for their systems with the special watchdog.
The thing with HP's special watchdog timer is that it does _not_ have a
chipset specific NMI it is trying to catch. HP is going on the assumption
that _all_ NMIs are /bad/ and they want to catch _every_ NMI, log it, and
reboot the system.
Now obviously NMIs from kgdb and oprofile are not the ones a system should
panic on but this breaks HP's assumptions.
So that is part of the problem. How do you become a catch-all for NMIs in
a system, to process as you wish, but ignore all the 'safe' NMIs?
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