On Tue, Apr 09, 2019 at 09:13:43PM +0800, Yafang Shao wrote: > Now we count PGSCAN_KSWAPD and PGSCAN_DIRECT into one single item > 'pgscan', that's not proper. > > PGSCAN_DIRECT is triggered by the tasks in this memcg, which directly > indicates the memory status of this memcg; PGSCAN_DIRECT occurs independent of cgroups when kswapd is overwhelmed or when allocations don't pass __GFP_KSWAPD_RECLAIM. You'll get direct reclaim inside memcgs that don't have a limit.
