docs/cgroup: add entry for misc.events

Added descriptions of misc.events.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 4d8c27eca96be72ea0df121978ad04dd588e6ae3..6658598c4d71f732edd467f7e8d7d570936627fc 100644 (file)
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -2310,6 +2310,16 @@ Miscellaneous controller provides 3 interface files. If two misc resources (res_
         Limits can be set higher than the capacity value in the misc.capacity
         file.
 
+  misc.events
+       A read-only flat-keyed file which exists on non-root cgroups. The
+       following entries are defined. Unless specified otherwise, a value
+       change in this file generates a file modified event. All fields in
+       this file are hierarchical.
+
+         max
+               The number of times the cgroup's resource usage was
+               about to go over the max boundary.
+
 Migration and Ownership
 ~~~~~~~~~~~~~~~~~~~~~~~