Decription of sanity check for memory thresholds.
Signed-off-by: Kirill A. Shutemov <kir...@shutemov.name>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com>
---
Documentation/cgroups/memcg_test.txt | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/Documentation/cgroups/memcg_test.txt
b/Documentation/cgroups/memcg_test.txt
index e011488..4d32e0e 100644
--- a/Documentation/cgroups/memcg_test.txt
+++ b/Documentation/cgroups/memcg_test.txt
@@ -396,3 +396,24 @@ Under below explanation, we assume
CONFIG_MEM_RES_CTRL_SWAP=y.
memory.stat of both A and B.
See 8.2 of Documentation/cgroups/memory.txt to see what value should be
written to move_charge_at_immigrate.
+
+ 9.10 Memory thresholds
+ Memory controler implements memory thresholds using cgroups notification
+ API. You can use Documentation/cgroups/cgroup_event_listener.c to test
+ it.
+
+ (Shell-A) Create cgroup and run event listener
+ # mkdir /cgroup/A
+ # ./cgroup_event_listener /cgroup/A/memory.usage_in_bytes 5M
+
+ (Shell-B) Add task to cgroup and try to allocate and free memory
+ # echo $$ >/cgroup/A/tasks
+ # a="$(dd if=/dev/zero bs=1M count=10)"
+ # a=
+
+ You will see message from cgroup_event_listener every time you cross
+ the thresholds.
+
+ Use /cgroup/A/memory.memsw.usage_in_bytes to test memsw thresholds.
+
+ It's good idea to test root cgroup as well.
--
1.6.6.2
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