Messages in this thread | | | Date | Sun, 29 Oct 2006 11:15:59 +0200 | From | Avi Kivity <> | Subject | Re: [kvm-devel] [PATCH 6/13] KVM: memory slot management |
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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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