| commit | 59807685a7e77e8c8fe5925613968841538d53d7 | [log] [tgz] |
|---|---|---|
| author | Huang Ying <[email protected]> | Wed Sep 06 16:22:34 2017 -0700 |
| committer | Linus Torvalds <[email protected]> | Wed Sep 06 17:27:28 2017 -0700 |
| tree | c2827c8a22e600f36258d6137a131a7150577b72 | |
| parent | 225311a46411c37e20e73d99f4382f141e12f6f9 [diff] |
mm, THP, swap: support splitting THP for THP swap out After adding swapping out support for THP (Transparent Huge Page), it is possible that a THP in swap cache (partly swapped out) need to be split. To split such a THP, the swap cluster backing the THP need to be split too, that is, the CLUSTER_FLAG_HUGE flag need to be cleared for the swap cluster. The patch implemented this. And because the THP swap writing needs the THP keeps as huge page during writing. The PageWriteback flag is checked before splitting. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: "Huang, Ying" <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Shaohua Li <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: "Kirill A . Shutemov" <[email protected]> Cc: Dan Williams <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Ross Zwisler <[email protected]> [for brd.c, zram_drv.c, pmem.c] Cc: Vishal L Verma <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>