On Tue 26-11-19 18:41:41, Roman Gushchin wrote: > On Tue, Nov 26, 2019 at 10:29:18AM +0100, Michal Hocko wrote: > > On Mon 25-11-19 10:54:53, Roman Gushchin wrote: [...] > > > So in a rare case when not all children kmem_caches are destroyed > > > at the moment when the root kmem_cache is about to be gone, we need > > > to wait another rcu grace period before destroying the root > > > kmem_cache. > > > > Could you explain how rare this really is please? > > It seems that we don't destroy root kmem_caches with enabled memcg > accounting that often, but maybe I'm biased here. So this happens each time a root kmem_cache is destroyed? Which would imply that only dynamically created ones? -- Michal Hocko SUSE Labs
