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memcg: oom: fix totalpages calculation for memory.swappiness==0
[platform/adaptation/renesas_rcar/renesas_kernel.git]
/
Documentation
/
cgroups
/
memory.txt
diff --git
a/Documentation/cgroups/memory.txt
b/Documentation/cgroups/memory.txt
index
c07f7b4
..
71c4da4
100644
(file)
--- a/
Documentation/cgroups/memory.txt
+++ b/
Documentation/cgroups/memory.txt
@@
-466,6
+466,10
@@
Note:
5.3 swappiness
Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only.
5.3 swappiness
Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only.
+Please note that unlike the global swappiness, memcg knob set to 0
+really prevents from any swapping even if there is a swap storage
+available. This might lead to memcg OOM killer if there are no file
+pages to reclaim.
Following cgroups' swappiness can't be changed.
- root cgroup (uses /proc/sys/vm/swappiness).
Following cgroups' swappiness can't be changed.
- root cgroup (uses /proc/sys/vm/swappiness).