Re: [PATCH] mmu_notifier, kvm: Introduce dirty bit tracking in spteand mmu notifier to help KSM dirty bit tracking

From: Izik Eidus
Date: Wed Jun 22 2011 - 11:19:44 EST

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 tree)
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