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mm: memory_hotplug: memory hotremove supports thp migration

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This patch enables thp migration for memory hotremove.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Naoya Horiguchi <[email protected]>
Signed-off-by: Zi Yan <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Anshuman Khandual <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David Nellans <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Naoya Horiguchi 2017-09-08 16:11:15 -07:00 • committed by Linus Torvalds
commit 8135d8926c
2 changed files with 17 additions and 2 deletions
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4
mm/memory_hotplug.c
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@ -1380,7 +1380,9 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
if (isolate_huge_page(page, &source))
move_pages -= 1 << compound_order(head);
continue;
}
} else if (thp_migration_supported() && PageTransHuge(page))
pfn = page_to_pfn(compound_head(page))
+ hpage_nr_pages(page) - 1;
if (!get_page_unless_zero(page))
continue;