Re: [PATCH v6 04/12] mm/hotplug: Prepare shrink_{zone, pgdat}_span for sub-section removal

[Pavel Tatashin]

On Wed, Apr 17, 2019 at 2:53 PM Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
>
> Sub-section hotplug support reduces the unit of operation of hotplug
> from section-sized-units (PAGES_PER_SECTION) to sub-section-sized units
> (PAGES_PER_SUBSECTION). Teach shrink_{zone,pgdat}_span() to consider
> PAGES_PER_SUBSECTION boundaries as the points where pfn_valid(), not
> valid_section(), can toggle.
>
> Cc: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Vlastimil Babka <vbabka@xxxxxxx>
> Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> ---
>  include/linux/mmzone.h |    2 ++
>  mm/memory_hotplug.c    |   16 ++++++++--------
>  2 files changed, 10 insertions(+), 8 deletions(-)

given removing all unused "*ms"

Reviewed-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>