Lucy, even in a healthy state, already have many page faults. They are just not on the hot path, e.g. logging. They don't affect latency much and nobody cares f

Lucy, even in a healthy state, already have many page faults. They are just not on the hot path, e.g. logging. They don't affect latency much and nobody cares for them. Turning off swapping has been a heated discussion, and I am on the negative side of it. Swapping is good; not all memory is important and some of it should not occupy precious physical space. Not all processes are important though. What I would rather have is a per-process swapping flag, allowing me to disable swapping for one or two essential processes, but swap the rest.