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| author | Johannes Weiner <hannes@cmpxchg.org> | 2016-05-05 16:22:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-05 17:38:53 -0700 |
| commit | 4550c4e157ca3da929593bb6c64080a59141af35 (patch) | |
| tree | 669934154f523a705f2da9f461095a0a36b6880b | |
| parent | 145bdaa1501bf1c8a6cfa8ea5e347b9a46aad1b7 (diff) | |
| download | linux-4550c4e157ca3da929593bb6c64080a59141af35.tar.bz2 | |
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@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: <stable@vger.kernel.org> [4.5]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/swap.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 2b83359c19ca..0a4cd4703f40 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -533,6 +533,10 @@ static inline swp_entry_t get_swap_page(void) #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; |