On 2/26/21 12:52 AM, Michal Hocko wrote: >> >> Michal, >> >> Let's take an extreme case where memcg 1 always generate the >> first event and memcg 2 generates the rest of 128*8-1 events >> and the pattern repeat. > > I do not follow. Events are per-memcg, aren't they? > __this_cpu_read(memcg->vmstats_percpu->targets[target]); > [...] > __this_cpu_write(memcg->vmstats_percpu->targets[target], next); > You are right. My previous reasoning is incorrect as the sampling is done per memcg. I'll do some additional debugging on why memcg is not on the tree. Tim
