The patch titled
Subject: mm/madvise: enable soft offline of HugeTLB pages at PUD level
has been added to the -mm tree. Its filename is
mm-madvise-enable-soft-offline-of-hugetlb-pages-at-pud-level.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-madvise-enable-soft-offline-of-hugetlb-pages-at-pud-level.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-madvise-enable-soft-offline-of-hugetlb-pages-at-pud-level.patch
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From: Alexandru Moise <00moses.alexander00@xxxxxxxxx>
Subject: mm/madvise: enable soft offline of HugeTLB pages at PUD level
Since 94310cbcaa3c2 ("mm/madvise: enable (soft|hard) offline of HugeTLB
pages at PGD level") we've been able to soft offline 1G hugepages at the
PGD level, however x86_64 gigantic hugepages are at the PUD level so we
should add an extra check to account for hstate order at PUD level.
I'm not sure if this also applies to 5 level page tables on x86_64
however. Tested with 4 level pagetable.
Link: http://lkml.kernel.org/r/20170913101047.GA13026@xxxxxxxxx
Signed-off-by: Alexandru Moise <00moses.alexander00@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Cc: Punit Agrawal <punit.agrawal@xxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/hugetlb.h | 1 +
1 file changed, 1 insertion(+)
diff -puN include/linux/hugetlb.h~mm-madvise-enable-soft-offline-of-hugetlb-pages-at-pud-level include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~mm-madvise-enable-soft-offline-of-hugetlb-pages-at-pud-level
+++ a/include/linux/hugetlb.h
@@ -480,6 +480,7 @@ static inline bool hugepage_migration_su
{
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
if ((huge_page_shift(h) == PMD_SHIFT) ||
+ (huge_page_shift(h) == PUD_SHIFT) ||
(huge_page_shift(h) == PGDIR_SHIFT))
return true;
else
_
Patches currently in -mm which might be from 00moses.alexander00@xxxxxxxxx are
mm-hugetlb-soft_offline-save-compound-page-order-before-page-migration.patch
mm-madvise-enable-soft-offline-of-hugetlb-pages-at-pud-level.patch
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