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authorMinchan Kim <minchan@kernel.org>2017-05-03 14:54:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-03 15:52:10 -0700
commit18863d3a3f593f47b075b9f53ebf9228dc76cf72 (patch)
tree0c24aa1232e3026972ecc668629e930ecdaae8c9 /mm/vmscan.c
parentc24f386c60b2269d532a23e70939ed8ce55d7005 (diff)
downloadlinux-18863d3a3f593f47b075b9f53ebf9228dc76cf72.tar.bz2
mm: remove SWAP_DIRTY in ttu
If we found lazyfree page is dirty, try_to_unmap_one can just SetPageSwapBakced in there like PG_mlocked page and just return with SWAP_FAIL which is very natural because the page is not swappable right now so that vmscan can activate it. There is no point to introduce new return value SWAP_DIRTY in try_to_unmap at the moment. Link: http://lkml.kernel.org/r/1489555493-14659-3-git-send-email-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> 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>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index e54c882d6789..f1fd388454bd 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1147,9 +1147,6 @@ static unsigned long shrink_page_list(struct list_head *page_list,
if (page_mapped(page)) {
switch (ret = try_to_unmap(page,
ttu_flags | TTU_BATCH_FLUSH)) {
- case SWAP_DIRTY:
- SetPageSwapBacked(page);
- /* fall through */
case SWAP_FAIL:
nr_unmap_fail++;
goto activate_locked;