On Mon 02-10-17 13:24:25, Shakeel Butt wrote:

On Mon, Oct 2, 2017 at 12:56 PM, Michal Hocko [off-list ref] wrote:

quoted

On Mon 02-10-17 12:45:18, Shakeel Butt wrote:

quoted

quoted

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