On 7/21/21 2:38 PM, Zi Yan wrote: > On 21 Jul 2021, at 2:39, Huang Ying wrote: >> From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> >> >> Global reclaim aims to reduce the amount of memory used on a >> given node or set of nodes. Migrating pages to another node >> serves this purpose. >> >> memcg reclaim is different. Its goal is to reduce the total >> memory consumption of the entire memcg, across all nodes. >> Migration does not assist memcg reclaim because it just moves >> page contents between nodes rather than actually reducing memory >> consumption. ... > Should this be folded into Patch 4 when can_demote() is > introduced? I guess it could be. But, it's logically separate since it has its own justification which is rather discrete. I think it's best to keep it separate.
