On Thu, Oct 08, 2020 at 07:55:02PM +0200, Vlastimil Babka wrote: > Right, here's updated patch: > > ----8<---- > From 6ab0f03762d122a896349d5e568f75c20875eb42 Mon Sep 17 00:00:00 2001 > From: Vlastimil Babka <vbabka@xxxxxxx> > Date: Mon, 7 Sep 2020 14:20:08 +0200 > Subject: [PATCH v2 5/7] mm, page_alloc: cache pageset high and batch in struct > zone > > All per-cpu pagesets for a zone use the same high and batch values, that are > duplicated there just for performance (locality) reasons. This patch adds the > same variables also to struct zone as a shared copy. > > This will be useful later for making possible to disable pcplists temporarily > by setting high value to 0, while remembering the values for restoring them > later. But we can also immediately benefit from not updating pagesets of all > possible cpus in case the newly recalculated values (after sysctl change or > memory online/offline) are actually unchanged from the previous ones. > > Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx> > Acked-by: Michal Hocko <mhocko@xxxxxxxx> LGTM, Reviewed-by: Oscar Salvador <osalvador@xxxxxxx> -- Oscar Salvador SUSE L3
