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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2016-07-27 00:25:56 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-27 01:19:19 +0200 |
| commit | 7751b2da6be0b59da0838a05153a646df1affbce (patch) | |
| tree | 451727d9d00902b1d91c33449832344435977453 /mm/vmscan.c | |
| parent | thp, mlock: do not mlock PTE-mapped file huge pages (diff) | |
| download | linux-7751b2da6be0b59da0838a05153a646df1affbce.tar.xz linux-7751b2da6be0b59da0838a05153a646df1affbce.zip | |
vmscan: split file huge pages before paging them out
This is preparation of vmscan for file huge pages. We cannot write out
huge pages, so we need to split them on the way out.
Link: http://lkml.kernel.org/r/1466021202-61880-22-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 93ba33789ac6..21d417ccff69 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1055,8 +1055,14 @@ static unsigned long shrink_page_list(struct list_head *page_list, /* Adding to swap updated mapping */ mapping = page_mapping(page); + } else if (unlikely(PageTransHuge(page))) { + /* Split file THP */ + if (split_huge_page_to_list(page, page_list)) + goto keep_locked; } + VM_BUG_ON_PAGE(PageTransHuge(page), page); + /* * The page is mapped into the page tables of one or more * processes. Try to unmap it here. |