The patch titled
Subject: thp-increase-split_huge_page-success-rate-fix
has been added to the -mm tree. Its filename is
thp-increase-split_huge_page-success-rate-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/thp-increase-split_huge_page-success-rate-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/thp-increase-split_huge_page-success-rate-fix.patch
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------------------------------------------------------
From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Subject: thp-increase-split_huge_page-success-rate-fix
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN mm/huge_memory.c~thp-increase-split_huge_page-success-rate-fix mm/huge_memory.c
--- a/mm/huge_memory.c~thp-increase-split_huge_page-success-rate-fix
+++ a/mm/huge_memory.c
@@ -3260,6 +3260,7 @@ int split_huge_page_to_list(struct page
struct page *head = compound_head(page);
struct anon_vma *anon_vma;
int count, mapcount, ret;
+ bool mlocked;
VM_BUG_ON_PAGE(is_huge_zero_page(page), page);
VM_BUG_ON_PAGE(!PageAnon(page), page);
@@ -3290,11 +3291,13 @@ int split_huge_page_to_list(struct page
goto out_unlock;
}
+ mlocked = PageMlocked(page);
freeze_page(anon_vma, head);
VM_BUG_ON_PAGE(compound_mapcount(head), head);
/* Make sure the page is not on per-CPU pagevec as it takes pin */
- lru_add_drain();
+ if (mlocked)
+ lru_add_drain();
/* Prevent deferred_split_scan() touching ->_count */
spin_lock(&split_queue_lock);
_
Patches currently in -mm which might be from kirill@xxxxxxxxxxxxx are
futex-thp-remove-special-case-for-thp-in-get_futex_key-fix.patch
mm-thp-remove-infrastructure-for-handling-splitting-pmds-fix.patch
mm-rework-mapcount-accounting-to-enable-4k-mapping-of-thps-fix-4.patch
thp-reintroduce-split_huge_page-fix-2.patch
mm-prepare-page_referenced-and-page_idle-to-new-thp-refcounting-fix.patch
thp-increase-split_huge_page-success-rate-fix.patch
mm-add-page_check_address_transhuge-helper-fix-fix.patch
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