On Wed 02-09-20 11:53:00, Vlastimil Babka wrote: > >> > > Thread #2: ccs killer kthread > >> > > css_killed_work_fn > >> > > cgroup_mutex <- Grab this Mutex > >> > > mem_cgroup_css_offline > >> > > memcg_offline_kmem.part > >> > > memcg_deactivate_kmem_caches > >> > > get_online_mems > >> > > mem_hotplug_lock <- waits for Thread#1 to get read access And one more thing. THis has been brought up several times already. Maybe I have forgoten but why do we take hotplug locks in this path in the first place? Memory hotplug notifier takes slab_mutex so this shouldn't be really needed. -- Michal Hocko SUSE Labs
