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SubjectRe: [PATCH] mmu_notifier, kvm: Introduce dirty bit tracking in spte and mmu notifier to help KSM dirty bit tracking

> If we don't flush the smp tlb don't we risk that we'll insert pages in
> the unstable tree that are volatile just because the dirty bit didn't
> get set again on the spte?

Yes, this is the trade off we take, the unstable tree will be flushed
anyway -
so this is nothing that won`t be recovered very soon after it happen...

and most of the chances the tlb will be flushed before ksm get there anyway
(specially for heavily modified page, that we don`t want in the unstable

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