On Wed 19-04-17 14:41:30, Tetsuo Handa wrote: [...] > Somebody is waiting forever with cpu_hotplug.lock held?
Why would that matter for drain_all_pages? It doesn't use
get_online_cpus since a459eeb7b852 ("mm, page_alloc: do not depend on
cpu hotplug locks inside the allocator") while ce612879ddc7 ("mm: move
pcp and lru-pcp draining into single wq") was merged later.
--
Michal Hocko
SUSE Labs
