Messages in this thread | | | Date | Wed, 27 Nov 2019 13:32:25 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH] mm: memcg/slab: wait for !root kmem_cache refcnt killing on root kmem_cache destruction |
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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
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