On Wed 24-08-22 10:23:14, Zhaoyang Huang wrote: > On Tue, Aug 23, 2022 at 7:51 PM Michal Hocko <mhocko@xxxxxxxx> wrote: [...] > > One way to achieve that would be shaping the hierarchy the following way > > root > > / \ > > no_memcg[1] memcg[2] > > |||||||| ||||| > > app_cgroups app_cgroups > > > > with > > no_memcg.subtree_control = "" > > memcg.subtree_control = memory > > > > no? > According to my understanding, No as there will be no no_memcg. All > children groups under root would have its cgroup.controllers = memory > as long as root has memory enabled. Correct > Under this circumstance, all > descendants group under 'no_memcg' will charge memory to its parent > group. Correct. And why is that a problem? I thought you main concern was a per application LRUs. With the above configuration all app_cgroups which do not require an explicit memory control will share the same (no_memcg) LRU and they will be aged together. -- Michal Hocko SUSE Labs
