On Fri 07-01-22 09:55:09, Michal Hocko wrote: [...] > > In this case, lru_gen_mm_walk is small (160 bytes); it's per direct > > reclaimer; and direct reclaimers rarely come here, i.e., only when > > kswapd can't keep up in terms of the aging, which is similar to the > > condition where the inactive list is empty for the active/inactive > > lru. > > Well, this is not a strong argument to be honest. Kswapd being stuck > and the majority of the reclaim being done in the direct reclaim > context is a situation I have seen many many times. Also do not forget that memcg reclaim is effectivelly only direct reclaim. Not that the memcg reclaim indicates a global memory shortage but it can add up and race with the global reclaim as well. -- Michal Hocko SUSE Labs
