[PATCH v4] memcg: Add memory.pressure_level events

With this patch userland applications that want to maintain the interactivity/memory allocation cost can use the pressure level notifications. The levels are defined like this: The "low" level means that the system is reclaiming memory for new allocations. Monitoring this reclaiming activity

[PATCH v4] memcg: Add memory.pressure_level events

With this patch userland applications that want to maintain the interactivity/memory allocation cost can use the pressure level notifications. The levels are defined like this: The low level means that the system is reclaiming memory for new allocations. Monitoring this reclaiming activity might