diff options
| author | Minchan Kim <minchan@kernel.org> | 2017-05-03 14:54:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-03 15:52:10 -0700 |
| commit | 22ffb33f4620b502799877d4186502bfe20621ea (patch) | |
| tree | 6eda10042e0e063ee3466aea6faf5969c2727eda | |
| parent | 18863d3a3f593f47b075b9f53ebf9228dc76cf72 (diff) | |
mm: remove SWAP_MLOCK check for SWAP_SUCCESS in ttu
If the page is mapped and rescue in try_to_unmap_one, the
page_mapcount() of a page cannot be zero, so the page_mapcount check in
try_to_unmap is enough to return SWAP_SUCCESS. IOW, SWAP_MLOCK check is
redundant so remove it.
Link: http://lkml.kernel.org/r/1489555493-14659-4-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/rmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index f6aa18d8a420..dfe40557ea29 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1535,7 +1535,7 @@ int try_to_unmap(struct page *page, enum ttu_flags flags) else ret = rmap_walk(page, &rwc); - if (ret != SWAP_MLOCK && !page_mapcount(page)) + if (!page_mapcount(page)) ret = SWAP_SUCCESS; return ret; } |