Architectures like arm64 have PUD level HugeTLB pages for certain configs
(1GB huge page is PUD based on ARM64_4K_PAGES base page size) that can be
enabled for migration. It can be achieved through checking for PUD_SHIFT
order based HugeTLB pages during migration.
Reviewed-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Reviewed-by: Steve Capper <steve.capper@xxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
include/linux/hugetlb.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 1b858d7..70bcd89 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -497,7 +497,8 @@ static inline bool hugepage_migration_supported(struct hstate *h)
{
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
if ((huge_page_shift(h) == PMD_SHIFT) ||
- (huge_page_shift(h) == PGDIR_SHIFT))
+ (huge_page_shift(h) == PUD_SHIFT) ||
+ (huge_page_shift(h) == PGDIR_SHIFT))
return true;
else
return false;
--
2.7.4
