Hi Shakeel.

On Tue, Jul 07, 2020 at 10:02:50AM -0700, Shakeel Butt [off-list ref] wrote:

quoted

Well, I was talkingg about memory.low. It is not meant only to protect
from the global reclaim. It can be used for balancing memory reclaim
from _any_ external memory pressure source. So it is somehow related to
the usecase you have mentioned.

For the uswapd use-case, I am not concerned about the external memory
pressure source but the application hitting its own memory.high limit
and getting throttled.

FTR, you can transform own memory.high into "external" pressure with a
hierarchy such as

  limit-group			memory.high=N+margin memory.low=0
  `- latency-sensitive-group	memory.low=N
  `- regular-group		memory.low=0

Would that ensure the latency targets?

Michal