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authorAnshuman Khandual <anshuman.khandual@arm.com>2019-03-05 15:43:48 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-05 21:07:15 -0800
commit9b553bf5eb99dd1b2d8ae23136da46da5c205dfd (patch)
treec4caaa4c67dac61a1edbc0a0a848cfa0a1bef6a5
parent7ed2c31dabdeb3ee6abe8ff5aac7287821a50cba (diff)
mm/hugetlb: enable PUD level huge page migration
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. Link: http://lkml.kernel.org/r/1545121450-1663-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reviewed-by: Steve Capper <steve.capper@arm.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/hugetlb.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 1b858d795731..70bcd8973323 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;