Re: [PATCH v9 6/8] common/grant_table: batch flush I/O TLB

[Julien Grall <julien@xxxxxxx>]

Hi Paul,

On 15/09/2020 09:29, Paul Durrant wrote:
> From: Paul Durrant <pdurrant@xxxxxxxxxx>
>
> This patch avoids calling iommu_iotlb_flush() for each individual GNTTABOP and
> instead calls iommu_iotlb_flush_all() at the end of a batch. This should mean
> non-singleton map/unmap operations perform better.
>
> NOTE: A batch is the number of operations done before a pre-emption check and,
>        in the case of unmap, a TLB flush.
>
> Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
> Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx>
> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall