[PATCH v6 06/10] mm/memory_hotplug: Poison memmap in remove_pfn_range_from_zone()

[Oscar Salvador]

On Sun, Oct 06, 2019 at 10:56:42AM +0200, David Hildenbrand wrote:
> Let's poison the pages similar to when adding new memory in
> sparse_add_section(). Also call remove_pfn_range_from_zone() from
> memunmap_pages(), so we can poison the memmap from there as well.
> 
> While at it, calculate the pfn in memunmap_pages() only once.
> 
> Cc: Andrew Morton <akpm at linux-foundation.org>
> Cc: David Hildenbrand <david at redhat.com>
> Cc: Oscar Salvador <osalvador at suse.de>
> Cc: Michal Hocko <mhocko at suse.com>
> Cc: Pavel Tatashin <pasha.tatashin at soleen.com>
> Cc: Dan Williams <dan.j.williams at intel.com>
> Signed-off-by: David Hildenbrand <david at redhat.com>

Looks good to me, it is fine as long as we do not access those pages later on,
and if my eyes did not lie to me, we have to proper checks (pfn_to_online_page)
in place to avoid that, so:

Reviewed-by: Oscar Salvador <osalvador at suse.de>

-- 
Oscar Salvador
SUSE L3