A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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mm: remove SWAP_DIRTY in ttu

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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/[email protected]
Signed-off-by: Minchan Kim <[email protected]>
Acked-by: Hillf Danton <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Anshuman Khandual <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Minchan Kim 2017-05-03 14:54:04 -07:00 • committed by Linus Torvalds
commit 18863d3a3f
3 changed files with 2 additions and 6 deletions
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3
mm/vmscan.c
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@ -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;