Re: [patch] disable NMI watchdog by default

[Avi Kivity]

Bill Davidsen wrote:
> > there's a new NMI watchdog related problem: KVM crashes on certain 
> > bzImages because ... we enable the NMI watchdog by default (even if 
> > the user does not ask for it) , and no other OS on this planet does 
> > that so KVM doesnt have emulation for that yet. So KVM injects a #GP, 
> > which crashes the Linux guest:
> I'm missing something, what limits this to systems running under kvm?

Most likely kvm doesn't implement the msrs which drive the nmi 
watchdog.  That makes it a kvm bug, not a problem with the nmi 
watchdog.  Emulating it correctly is fairly difficult, though, 
especially if we want to migrate virtual machines between different 
processor models, so I hope this goes in.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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