[vbox-dev] NMI watchdog on Linux guest

Ricardo M. Correia Ricardo.M.Correia at Sun.COM
Mon Oct 13 15:37:16 GMT 2008


Any thoughts about this issue?

I see there's a VBOX_WITH_NMI symbol in VB's code, but I'm not sure if
this enables NMIs in the guest, nor am I sure how to enable this symbol.

I don't mind compiling the code myself and I don't mind if this has a
performance penalty, as long as the NMI watchdog works in the guest.


On Dom, 2008-10-12 at 03:45 +0200, Ricardo M. Correia wrote:
> Hi,
> I'm trying to set up a virtual machine for Linux kernel development.
> One thing that I'd like to do is to use something equivalent to the NMI
> watchdog feature to trigger a crash dump when the (guest) kernel suffers
> a hard lockup.
> However, the NMI watchdog seems to be non-functional on a Linux guest.
> Is there a way to enable them?
> Alternatively, is there another way I can trigger a panic or crash dump
> on a Linux guest when it has disabled interrupts?
> Thanks in advance,
> Ricardo
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