diff options
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 5e8dab5bf9ad..de1c1bddb4d1 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -5606,6 +5606,12 @@ int __init cgroup_init(void) BUG_ON(cgroup_init_cftypes(NULL, cgroup_dfl_base_files)); BUG_ON(cgroup_init_cftypes(NULL, cgroup_legacy_base_files)); + /* + * The latency of the synchronize_sched() is too high for cgroups, + * avoid it at the cost of forcing all readers into the slow path. + */ + rcu_sync_enter_start(&cgroup_threadgroup_rwsem.rss); + get_user_ns(init_cgroup_ns.user_ns); mutex_lock(&cgroup_mutex); |