summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJohannes Weiner <hannes@cmpxchg.org>2016-05-05 16:22:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-05 17:38:53 -0700
commit4550c4e157ca3da929593bb6c64080a59141af35 (patch)
tree669934154f523a705f2da9f461095a0a36b6880b
parent145bdaa1501bf1c8a6cfa8ea5e347b9a46aad1b7 (diff)
downloadlinux-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.h4
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;