27 Nov
2019
27 Nov
'19
12:32 p.m.
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