From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 23 Nov 2018 00:07:14 +0000 (+0100)
Subject: cgroup: extend comment on what unit_release_cgroup() is for
X-Git-Tag: v240~225^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a0d538815b72563eb227fa21a67e78f5b290bfe;p=thirdparty%2Fsystemd.git

cgroup: extend comment on what unit_release_cgroup() is for
---

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 988813c38bf..38032311416 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -2005,7 +2005,8 @@ int unit_realize_cgroup(Unit *u) {
 void unit_release_cgroup(Unit *u) {
         assert(u);
 
-        /* Forgets all cgroup details for this cgroup */
+        /* Forgets all cgroup details for this cgroup — but does *not* destroy the cgroup. This is hence OK to call
+         * when we close down everything for reexecution, where we really want to leave the cgroup in place. */
 
         if (u->cgroup_path) {
                 (void) hashmap_remove(u->manager->cgroup_unit, u->cgroup_path);