Re: [v8 0/4] cgroup-aware OOM killer

[Michal Hocko]

On Mon 02-10-17 13:24:25, Shakeel Butt wrote:
> On Mon, Oct 2, 2017 at 12:56 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> > On Mon 02-10-17 12:45:18, Shakeel Butt wrote:
> >> > I am sorry to cut the rest of your proposal because it simply goes over
> >> > the scope of the proposed solution while the usecase you are mentioning
> >> > is still possible. If we want to compare intermediate nodes (which seems
> >> > to be the case) then we can always provide a knob to opt-in - be it your
> >> > oom_gang or others.
> >>
> >> In the Roman's proposed solution we can already force the comparison
> >> of intermediate nodes using 'oom_group', I am just requesting to
> >> separate the killall semantics from it.
> >
> > oom_group _is_ about killall semantic.  And comparing killable entities
> > is just a natural thing to do. So I am not sure what you mean
> >
> 
> I am saying decouple the notion of comparable entities and killable entities.

There is no strong (bijection) relation there. Right now killable
entities are comparable (which I hope we agree is the right thing to do)
but nothing really prevents even non-killable entities to be compared in
the future.

-- 
Michal Hocko
SUSE Labs