On Mon, 17 Jan 2000, Manfred Spraul wrote:
> > This may be intentional for some uses of __flush_tlb(), but there are
> > several places where
> > Linux attempts to flush TLB entries for global pages, such as in the smp
> > boot code.
> Yes, I agree this is a bug. Which functions use the global bit and
> assume that flush_tlb_all() flushes them?
>
> * zap_low_mappings()
> * kmap: kmap_prot contains _PAGE_GLOBAL, ie all kmap flushes are wrong !
yeah, this is indeed a bug and it also explains the one remaining 64GB
mystery: the extra invlpg in highmem.c. Patch (with other SMP fixes) will
follow shortly.
-- mingo
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