As I've said, I do not see any major concern having this behavior
implicit, the behavior makes semantic sense and it is also much more
likely that the selected oom victim will be a better choice than what we
do currently. Especially on properly partitioned systems with large
memory consumers in each partition (cpuset).
That being said, I would just not add any sysctl at this stage and
rather document the decision. If we ever encounter usecase(s) which
would regress based on this change we can introcuce the sysctl later.