RE: ia64 mmu_gather question

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> So I suspect at this stage that the race isn't affecting you. However,
> it looks to me that you put the burden on the fairly hot TLB miss path
> rather than on the much less hot invalidation path itself...

Suggestions on how to do move the burden gratefully received.  I don't
think that it is all that bad though.  The re-read of the PGD>PUD>PMD>PTE
should all hit in the L1-D cache, which has single cycle latency.

-Tony
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