On Mon, Aug 23, 2021 at 01:48:43PM -0400, Johannes Weiner [off-list ref] wrote:

Note that this isn't new behavior.

Understood, there may be a difference between:
a) a cgroup where the protected reserve was detected (this changed),
b) a cgroup where the protected memory is reclaimed.

"The number of times the cgroup's memory.low-protected memory was
reclaimed in order to avoid OOM during high memory pressure."

Yes, this is what I meant (i.e. events for the case b) above).

Michal