path: root/mm/vmpressure.c
diff options
authorzhongjiang <>2017-06-16 14:02:40 -0700
committerLinus Torvalds <>2017-06-17 06:37:05 +0900
commitd7143e31259cb029e207619209b31aa7520f8e28 (patch)
treecb5b5117641013f879eb5d0794ece76533d65e72 /mm/vmpressure.c
parent64c2b20301f62c697352c8028c569b1b2bdd8e82 (diff)
mm: correct the comment when reclaimed pages exceed the scanned pages
Commit e1587a494540 ("mm: vmpressure: fix sending wrong events on underflow") declared that reclaimed pages exceed the scanned pages due to the thp reclaim. That is incorrect because THP will be spilt to normal page and loop again, which will result in the scanned pages increment. [ tweak comment text] Link: Signed-off-by: zhongjiang <> Acked-by: Minchan Kim <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/vmpressure.c')
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 6063581f705c..ce0618bfa8d0 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -115,9 +115,9 @@ static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,
unsigned long pressure = 0;
- * reclaimed can be greater than scanned in cases
- * like THP, where the scanned is 1 and reclaimed
- * could be 512
+ * reclaimed can be greater than scanned for things such as reclaimed
+ * slab pages. shrink_node() just adds reclaimed pages without a
+ * related increment to scanned pages.
if (reclaimed >= scanned)
goto out;