On Tue, Mar 12, 2019 at 09:05:32AM +0100, Michal Hocko wrote: > On Mon 11-03-19 15:15:35, Suren Baghdasaryan wrote: > > Yeah, killing speed is a well-known problem which we are considering > > in LMKD. For example the recent LMKD change to assign process being > > killed to a cpuset cgroup containing big cores cuts the kill time > > considerably. This is not ideal and we are thinking about better ways > > to expedite the cleanup process. > > If you design is relies on the speed of killing then it is fundamentally > flawed AFAICT. You cannot assume anything about how quickly a task dies. > It might be blocked in an uninterruptible sleep or performin an > operation which takes some time. Sure, oom_reaper might help here but > still. Many UNINTERRUPTIBLE sleeps can be converted to KILLABLE sleeps. It just needs someone to do the work.
