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    SubjectRe: [PATCH v2 05/12] KVM: x86: fast emulate repeat string write instructions
    On 08/02/2011 02:09 PM, Xiao Guangrong wrote:
    > We usually use repeat string instructions to clear the page, for example,
    > we call memset to clear a page table, stosb is used in this function, and
    > repeated for 1024 times, that means we should occupy mmu lock for 1024 times
    > and walking shadow page cache for 1024 times, it is terrible
    >
    > In fact, if it is the repeat string instructions emulated and it is not a
    > IO/MMIO access, we can zap all the corresponding shadow pages and return to the
    > guest, then the mapping can became writable and we can directly write the page
    >

    This isn't needed if we zap before emulating, right?

    --
    error compiling committee.c: too many arguments to function



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