On 6/17/19 10:38 AM, Michal Hocko wrote: > [Cc linux-api] > > On Mon 17-06-19 10:21:49, Waiman Long wrote: >> There are concerns about memory leaks from extensive use of memory >> cgroups as each memory cgroup creates its own set of kmem caches. There >> is a possiblity that the memcg kmem caches may remain even after the >> memory cgroup removal. >> >> Therefore, it will be useful to show how many memcg caches are present >> for each of the kmem caches. > How is a user going to use that information? Btw. Don't we have an > interface to display the number of (dead) cgroups? The interface to report dead cgroups is for cgroup v2 (cgroup.stat) only. I don't think there is a way to find that for cgroup v1. Also the number of memcg kmem caches may not be the same as the number of memcg's. It can range from 0 to above the number of memcg's. So it is an interesting number by itself. >From the user perspective, if the numbers is way above the number of memcg's, there is probably something wrong there. Cheers, Longman
