Joonsoo Kim 9780795fc1 mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page
commit e1409c325fdc1fef7b3d8025c51892355f065d15 upstream.

pageblock_pfn_to_page() is used to check there is valid pfn and all
pages in the pageblock is in a single zone.  If there is a hole in the
pageblock, passing arbitrary position to pageblock_pfn_to_page() could
cause to skip whole pageblock scanning, instead of just skipping the
hole page.  For deterministic behaviour, it's better to always pass
pageblock aligned range to pageblock_pfn_to_page().  It will also help
further optimization on pageblock_pfn_to_page() in the following patch.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17 09:35:26 +01:00
..
2015-11-06 17:50:42 -08:00
2015-06-24 17:49:45 -07:00
2017-06-26 07:13:11 +02:00
2015-11-06 17:50:42 -08:00
2015-09-11 16:42:39 -07:00
2015-09-08 15:35:28 -07:00
2015-11-05 19:34:48 -08:00
2015-02-11 17:06:02 -08:00
2015-11-05 19:34:48 -08:00
2015-09-10 13:29:01 -07:00
2015-11-06 17:50:42 -08:00
2017-06-14 13:16:24 +02:00
2018-01-10 09:27:14 +01:00