Anthony Liguori wrote:
It's not about tlb entries. The shadow page tables collaples a GV ->
HV -> HP double translation into a GV -> HP page table. When the
Linux vm goes around evicting pages, it invalidates those mappings.
There are two solutions possible: lock pages which participate in
these translations (and their number can be large) or modify the
Linux vm to consult a reverse mapping and remove the translations (in
which case TLB entries need to be removed).
If you locked pages that have active shadow mappings, you could then
use a secondary mechanism to invalidate existing mappings when necessary.
Yes.
There are two needs: to propagate virtual machine activity to the host
(by folding dirty and accessed bits from multiple shadow ptes into a
single struct page), and to apply pressure from the vm to the guest (by
invalidating all mappings of a given page).
--
error compiling committee.c: too many arguments to function
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