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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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