> BTW, for x86 gurus: what will happen if in ring 0 you change %cr3
> (register, that is), leave the value in TSS unmodified and then return to
> ring 3? Is there any chance that processor will reload the old value
> (undefined/some processors are buggy and know to do that/it's documented
> behaviour/never happens on known processors)?
the TSS is only ever consulted when we switch from ring3 into ring0, to
get esp and ss registers. (plus the io bitmaps if using ioperm()) It's not
supposed to reload %cr3 except when we do an explicit TSS switch.
-- mingo
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