Re: [PATCH 6/6] KVM: MMU: Avoid handling same rmap_pde in kvm_handle_hva_range()

[Avi Kivity]

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


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