Re: [PATCH v7 09/14] AMD/IOMMU: free all-empty page tables

["Durrant, Paul" <xadimgnik@xxxxxxxxx>]

On 05/07/2022 13:47, Jan Beulich wrote:
> When a page table ends up with no present entries left, it can be
> replaced by a non-present entry at the next higher level. The page table
> itself can then be scheduled for freeing.
>
> Note that while its output isn't used there yet,
> pt_update_contig_markers() right away needs to be called in all places
> where entries get updated, not just the one where entries get cleared.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Paul Durrant <paul@xxxxxxx>