2 Sep
2020
2 Sep
'20
11:32 a.m.
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.
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Michal Hocko
SUSE Labs