Re: [patch] serial console vs NMI watchdog

[Ingo Molnar]

On Sun, 11 Mar 2001, Keith Owens wrote:

> kdb has to completely disable the nmi counter while it is in control.
> All interrupts are disabled, all but one cpus are spinning, the
> control cpu does busy wait while it polls the input devices.  With
> that model there is no alternative to a complete disable.

it sure has an alternative. The 'cpus spinning' code calls touch_nmi()
within the busy loop, the polling code on the control CPU too. This is
sure more robust and catches lockup bugs in kdb too ...

        Ingo


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