From: Shaun Tancheff <shaun@xxxxxxxxxxxx>
memcg-v1 does not expose memory min, low, and high.
These values should to be set to reasonable non-zero values
when max is set.
This patch sets them to 10%, 20% and 80% respective to max.
This fixes an issue with memory pressure with file systems
do an unbounded high rate of I/O hitting oom.
Signed-off-by: Shaun Tancheff <shaun.tancheff@xxxxxxx>
---
mm/memcontrol.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2eee092f8f11..0f5918d9dd2a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3491,6 +3491,15 @@ static int mem_cgroup_resize_max(struct mem_cgroup *memcg,
if (max > counter->max)
enlarge = true;
ret = page_counter_set_max(counter, max);
+ if (!ret && !memsw) {
+ unsigned long min = (max / 10) + 1;
+ unsigned long low = min * 2;
+ unsigned long high = max - low;
+
+ page_counter_set_min(counter, min);
+ page_counter_set_low(counter, low);
+ page_counter_set_high(counter, high);
+ }
mutex_unlock(&memcg_max_mutex);
if (!ret)
--
2.34.1
