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authorMinchan Kim <minchan@kernel.org>2017-05-04 00:54:13 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-04 01:52:10 +0300
commitad6b67041a45497261617d7a28b15159b202cb5a (patch)
treec91413b218dc487e06d42de60c91856e1126b150 /mm/vmscan.c
parent192d7232569ab61ded40c8be691b12832bc6bcd1 (diff)
downloadlinux-ad6b67041a45497261617d7a28b15159b202cb5a.tar.xz
mm: remove SWAP_MLOCK in ttu
ttu doesn't need to return SWAP_MLOCK. Instead, just return SWAP_FAIL because it means the page is not-swappable so it should move to another LRU list(active or unevictable). putback friends will move it to right list depending on the page's LRU flag. Link: http://lkml.kernel.org/r/1489555493-14659-6-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>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index f1fd388454bd..cfd2651966a8 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -987,7 +987,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
sc->nr_scanned++;
if (unlikely(!page_evictable(page)))
- goto cull_mlocked;
+ goto activate_locked;
if (!sc->may_unmap && page_mapped(page))
goto keep_locked;
@@ -1152,8 +1152,6 @@ static unsigned long shrink_page_list(struct list_head *page_list,
goto activate_locked;
case SWAP_AGAIN:
goto keep_locked;
- case SWAP_MLOCK:
- goto cull_mlocked;
case SWAP_SUCCESS:
; /* try to free the page below */
}
@@ -1295,20 +1293,16 @@ free_it:
list_add(&page->lru, &free_pages);
continue;
-cull_mlocked:
- if (PageSwapCache(page))
- try_to_free_swap(page);
- unlock_page(page);
- list_add(&page->lru, &ret_pages);
- continue;
-
activate_locked:
/* Not a candidate for swapping, so reclaim swap space. */
- if (PageSwapCache(page) && mem_cgroup_swap_full(page))
+ if (PageSwapCache(page) && (mem_cgroup_swap_full(page) ||
+ PageMlocked(page)))
try_to_free_swap(page);
VM_BUG_ON_PAGE(PageActive(page), page);
- SetPageActive(page);
- pgactivate++;
+ if (!PageMlocked(page)) {
+ SetPageActive(page);
+ pgactivate++;
+ }
keep_locked:
unlock_page(page);
keep: