On Mon 29-07-19 10:28:43, Yang Shi wrote: [...] > I don't worry too much about scale since the scale issue is not unique > to background reclaim, direct reclaim may run into the same problem.
Just to clarify. By scaling problem I mean 1:1 kswapd thread to memcg. You can have thousands of memcgs and I do not think we really do want to create one kswapd for each. Once we have a kswapd thread pool then we get into a tricky land where a determinism/fairness would be non trivial to achieve. Direct reclaim, on the other hand is bound by the workload itself. -- Michal Hocko SUSE Labs
