Andrew Morton <[email protected]> writes:
> Jan Beulich <[email protected]> wrote:
> >
> > Make the double fault handler use CPU-specific stacks. Add some
> > abstraction to simplify future change of other exception handlers to go
> > through task gates. Change the pointer validity checks in the double
> > fault handler to account for the fact that both GDT and TSS aren't in
> > static kernel space anymore. Add a new notification of the event
> > through the die notifier chain, also providing some environmental
> > adjustments so that various infrastructural things work independent of
> > the fact that the fault and the callbacks are running on other then the
> > normal kernel stack.
>
> Why?
Means that if you have two double faults in parallel they still
work. Good for robustness under kernel bugs.
-Andi
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