On Wed, Jul 21, 2021 at 2:58 PM Dave Hansen <dave.hansen@xxxxxxxxx> wrote: > > 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. Yes, I agree.
