diff mbox series

[V3,2/5] mm/hugetlb: Enable PUD level huge page migration

Message ID 1540299721-26484-3-git-send-email-anshuman.khandual@arm.com (mailing list archive)
State New, archived
Headers show
Series arm64/mm: Enable HugeTLB migration | expand

Commit Message

Anshuman Khandual Oct. 23, 2018, 1:01 p.m. UTC 
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@ah.jp.nec.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 include/linux/hugetlb.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Steve Capper Nov. 8, 2018, 10:34 a.m. UTC | #1 
On Tue, Oct 23, 2018 at 06:31:58PM +0530, Anshuman Khandual wrote:
> 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@ah.jp.nec.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>

Reviewed-by: Steve Capper <steve.capper@arm.com>

> ---
>  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
>
diff mbox series

Patch

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;