Michal Hocko <mhocko@xxxxxxxxxx> wrote: > On Thu 28-06-18 16:19:07, Greg Thelen wrote: >> Michal Hocko <mhocko@xxxxxxxxxx> wrote: > [...] >> > + if (mem_cgroup_out_of_memory(memcg, mask, order)) >> > + return OOM_SUCCESS; >> > + >> > + WARN(1,"Memory cgroup charge failed because of no reclaimable memory! " >> > + "This looks like a misconfiguration or a kernel bug."); >> >> I'm not sure here if the warning should here or so strongly worded. It >> seems like the current task could be oom reaped with MMF_OOM_SKIP and >> thus mem_cgroup_out_of_memory() will return false. So there's nothing >> alarming in that case. > > If the task is reaped then its charges should be released as well and > that means that we should get below the limit. Sure there is some room > for races but this should be still unlikely. Maybe I am just > underestimating though. > > What would you suggest instead? I suggest checking MMF_OOM_SKIP or deleting the warning. But I don't feel strongly.
