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. > > Link: https://lkml.kernel.org/r/20210715055145.195411-9-ying.huang@xxxxxxxxx > Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx> > Suggested-by: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx> > Reviewed-by: Yang Shi <shy828301@xxxxxxxxx> > Cc: Michal Hocko <mhocko@xxxxxxxx> > Cc: Wei Xu <weixugc@xxxxxxxxxx> > Cc: Oscar Salvador <osalvador@xxxxxxx> > Cc: Zi Yan <ziy@xxxxxxxxxx> > Cc: David Rientjes <rientjes@xxxxxxxxxx> > Cc: Dan Williams <dan.j.williams@xxxxxxxxx> > Cc: David Hildenbrand <david@xxxxxxxxxx> > Cc: Greg Thelen <gthelen@xxxxxxxxxx> > Cc: Keith Busch <kbusch@xxxxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > --- > mm/vmscan.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) LGTM. Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>. Should this be folded into Patch 4 when can_demote() is introduced? — Best Regards, Yan, Zi
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