Ben,
I've been giving some thought to the new software managed TLBs and SMP
issues. I was wondering if you had any insights on how we should deal
with the following issues:
* tlb invalidates -- need to ensure we don't have multiple tlbsync's
on the bus. I'm thinking for e500/fsl we will move to IPI based
invalidate broadcast and do invalidates locally (http://patchwork.ozlabs.org/linuxppc/patch?id=19657
)
* 64-bit PTEs and reader vs writer hazards. How do we ensure that the
TLB miss handler samples a consistent view of the pte. pte_updates
seem ok since we only update the flag word. However set_pte_at seems
like it could be problematic.
- k
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