linux-kernel - Re: [PATCH v6 04/12] mm/hotplug: Prepare shrink_{zone, pgdat}

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Date:   Thu, 2 May 2019 15:18:36 -0400
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Logan Gunthorpe <logang@...tatee.com>,
        linux-mm <linux-mm@...ck.org>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        LKML <linux-kernel@...r.kernel.org>,
        David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH v6 04/12] mm/hotplug: Prepare shrink_{zone, pgdat}_span
 for sub-section removal

On Wed, Apr 17, 2019 at 2:53 PM Dan Williams <dan.j.williams@...el.com> 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@...e.com>
> Cc: Vlastimil Babka <vbabka@...e.cz>
> Cc: Logan Gunthorpe <logang@...tatee.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> ---
>  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@...een.com>