The empty cgroup notification mechanism currently implemented in
cgroup is tragically outdated. Forking and execing userland process
stopped being a viable notification mechanism more than a decade ago.
We're gonna have a saner mechanism. Let's make it clear that this
abomination is going away.
Mark "notify_on_release" and "release_agent" with CFTYPE_INSANE.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
kernel/cgroup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4052,6 +4052,7 @@ static struct cftype files[] = {
},
{
.name = "notify_on_release",
+ .flags = CFTYPE_INSANE,
.read_u64 = cgroup_read_notify_on_release,
.write_u64 = cgroup_write_notify_on_release,
},
@@ -4073,7 +4074,7 @@ static struct cftype files[] = {
},
{
.name = "release_agent",
- .flags = CFTYPE_ONLY_ON_ROOT,
+ .flags = CFTYPE_INSANE | CFTYPE_ONLY_ON_ROOT,
.read_seq_string = cgroup_release_agent_show,
.write_string = cgroup_release_agent_write,
.max_write_len = PATH_MAX,
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