From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 7 Sep 2017 12:32:33 +0000 (+0200)
Subject: core: when coming back from reload/reexec, reapply all cgroup properties
X-Git-Tag: v235.1~94
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=e5ff123fa4c23ed39685f8f8dc7f77f1627a81fd;p=elogind.git

core: when coming back from reload/reexec, reapply all cgroup properties

With this change we'll invalidate all cgroup settings after coming back
from a daemon reload/reexec, so that the new settings are instantly
applied.

This is useful for the BPF case, because we don't serialize/deserialize
the BPF program fd, and hence have to install a new, updated BPF program
when coming back from the reload/reexec. However, this is also useful
for the rest of the cgroup settings, as it ensures that user
configuration really takes effect wherever we can.
---

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 1d1e2d38e..0ca80d975 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -1534,6 +1534,7 @@ static int unit_realize_cgroup_now(Unit *u, ManagerState state) {
 }
 
 static void unit_add_to_cgroup_queue(Unit *u) {
+        assert(u);
 
         if (u->in_cgroup_queue)
                 return;