On Sun, Aug 11, 2024 at 01:16:53PM -0700, David Rientjes wrote: > Hi Kaiyang, have you considered per-memcg control over NUMA balancing > operations as well? > > Wondering if that's the direction that you're heading in, because it would > be very useful to be able to control NUMA balancing at memcg granularity > on multi-tenant systems. > > I mentioned this at LSF/MM/BPF this year. If people believe this is out > of scope for memcg, that would be good feedback as well. Yes that's exactly where we are heading -- per-cgroup control of NUMA balancing operations in the context of memory tiering with CXL memory, by extending the concept of memory.low and memory.high. The use case is enabling a fair share of top tier memory across containers. I'm collaborating with Meta on this, and we already have an implementation and some experiments done. The patches will go out soon. If others have thoughts on this, please chime in. Best, Kaiyang Zhao
