Re: [PATCH -v3 5/6] x86, NMI, treat unknown NMI as hardware error

Don Zickus
2010-10-11T21:08:52Z

On Sun, Oct 10, 2010 at 04:13:11PM +0200, Andi Kleen wrote:
> > > These systems are identified via the presentation of APEI HEST or
> > > some PCI ID of the host bridge. The PCI ID of host bridge instead of
> > > DMI ID is used, so that the checking can be done based on the platform
> > > type instead of motherboard. This should be simpler and sufficient.
> > >
> > > The method to identify the platforms is designed by Andi Kleen.
> >
> > Why not make the new flag also a boot option so you can force it on for
> > platforms where we don't auto whitelist it.
>
> You can already set it at run time using sysctl.
>
> echo 1 > /proc/sys/kernel/panic_on_unrecovered_nmi
> echo 1 > /proc/sys/kernel/panic_on_io_nmi

I get the impression Alan was talking about the option

unknown_nmi_as_hwerr

which isn't hooked into a sysctl but will cause machines to panic.

Cheers,
Don