Avi Kivity wrote: > Marcelo Tosatti wrote: >> Hypercall based pte updates are faster than faults, and also allow use >> of the lazy MMU mode to batch operations. >> >> Don't report the feature if two dimensional paging is enabled. >> >> Signed-off-by: Marcelo Tosatti <[EMAIL PROTECTED]> >> +/* >> + * We only need to hook operations that are MMU writes. We hook >> these so that >> + * we can use lazy MMU mode to batch these operations. We could >> probably >> + * improve the performance of the host code if we used some of the >> information >> + * here to simplify processing of batched writes. >> + */ >> > > One option is, if the guest promises never to write to a page table > directly, is to avoid write protecting guest page tables. I think the > shadow code can handle it (since the gfn/spte relationship is > maintained by shadow code, and doesn't require reading the guest page > tables), but am not sure. >
In addition to reducing mmu work for write protection, this allows more efficient use of large pages. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
