Messages in this thread | | | Date | Mon, 29 Jul 2019 20:48:50 +0200 | From | Michal Hocko <> | Subject | Re: [PATCH RFC] mm/memcontrol: reclaim severe usage over high limit in get_user_pages loop |
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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
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