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-rw-r--r--Documentation/cgroup-v2.txt18
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diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt
index 46ec3f76211c..dc44785dc0fa 100644
--- a/Documentation/cgroup-v2.txt
+++ b/Documentation/cgroup-v2.txt
@@ -868,6 +868,24 @@ All cgroup core files are prefixed with "cgroup."
If the actual descent depth is equal or larger,
an attempt to create a new child cgroup will fail.
+ cgroup.stat
+ A read-only flat-keyed file with the following entries:
+
+ nr_descendants
+ Total number of visible descendant cgroups.
+
+ nr_dying_descendants
+ Total number of dying descendant cgroups. A cgroup becomes
+ dying after being deleted by a user. The cgroup will remain
+ in dying state for some time undefined time (which can depend
+ on system load) before being completely destroyed.
+
+ A process can't enter a dying cgroup under any circumstances,
+ a dying cgroup can't revive.
+
+ A dying cgroup can consume system resources not exceeding
+ limits, which were active at the moment of cgroup deletion.
+
Controllers
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