The patch titled
Subject: mm: memcontrol: let v2 cgroups follow changes in system swappiness
has been added to the -mm tree. Its filename is
mm-memcontrol-let-v2-cgroups-follow-changes-in-system-swappiness.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-let-v2-cgroups-follow-changes-in-system-swappiness.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-let-v2-cgroups-follow-changes-in-system-swappiness.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: let v2 cgroups follow changes in system swappiness
Cgroup2 currently doesn't have a per-cgroup swappiness setting. We might
want to add one later - that's a different discussion - but until we do,
the cgroups should always follow the system setting. Otherwise it will be
unchangeably set to whatever the ancestor inherited from the system
setting at the time of cgroup creation.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [4.5]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/swap.h | 4 ++++
1 file changed, 4 insertions(+)
diff -puN include/linux/swap.h~mm-memcontrol-let-v2-cgroups-follow-changes-in-system-swappiness include/linux/swap.h
--- a/include/linux/swap.h~mm-memcontrol-let-v2-cgroups-follow-changes-in-system-swappiness
+++ a/include/linux/swap.h
@@ -533,6 +533,10 @@ static inline swp_entry_t get_swap_page(
#ifdef CONFIG_MEMCG
static inline int mem_cgroup_swappiness(struct mem_cgroup *memcg)
{
+ /* Cgroup2 doesn't have per-cgroup swappiness */
+ if (cgroup_subsys_on_dfl(memory_cgrp_subsys))
+ return vm_swappiness;
+
/* root ? */
if (mem_cgroup_disabled() || !memcg->css.parent)
return vm_swappiness;
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
mm-memcontrol-let-v2-cgroups-follow-changes-in-system-swappiness.patch
mm-filemap-only-do-access-activations-on-reads.patch
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