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SubjectRe: [PATCH 6/6] KVM: MMU: Avoid handling same rmap_pde in kvm_handle_hva_range()
On 06/28/2012 05:02 AM, Takuya Yoshikawa wrote:
> When we invalidate a THP page, we call the handler with the same
> rmap_pde argument 512 times in the following loop:
>
> for each guest page in the range
> for each level
> unmap using rmap
>
> This patch avoids these extra handler calls by changing the loop order
> like this:
>
> for each level
> for each rmap in the range
> unmap using rmap
>
> With the preceding patches in the patch series, this made THP page
> invalidation more than 5 times faster on our x86 host: the host became
> more responsive during swapping the guest's memory as a result.
>
> Note: in the new code we could not use trace_kvm_age_page(), so we just
> dropped the point from kvm_handle_hva_range().
>

Can't it be pushed to handler()?



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




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