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-rw-r--r--Documentation/cgroups/unified-hierarchy.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/cgroups/unified-hierarchy.txt b/Documentation/cgroups/unified-hierarchy.txt
index 176b940f8327..6932453d37a2 100644
--- a/Documentation/cgroups/unified-hierarchy.txt
+++ b/Documentation/cgroups/unified-hierarchy.txt
@@ -374,6 +374,10 @@ supported and the interface files "release_agent" and
- The "cgroup.clone_children" file is removed.
+- /proc/PID/cgroup keeps reporting the cgroup that a zombie belonged
+ to before exiting. If the cgroup is removed before the zombie is
+ reaped, " (deleted)" is appeneded to the path.
+
5-3. Controller File Conventions