Messages in this thread | | | Subject | Re: [PATCH] i386 double fault enhancements | From | Andi Kleen <> | Date | 23 Feb 2006 11:34:36 +0100 |
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Andrew Morton <akpm@osdl.org> writes:
> Jan Beulich <jbeulich@novell.com> 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.
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