diff options
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6ad309e9825..964a70035e8 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1171,7 +1171,9 @@ __mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype) mz = page_cgroup_zoneinfo(pc); unlock_page_cgroup(pc); - css_put(&mem->css); + /* at swapout, this memcg will be accessed to record to swap */ + if (ctype != MEM_CGROUP_CHARGE_TYPE_SWAPOUT) + css_put(&mem->css); return mem; @@ -1212,6 +1214,8 @@ void mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent) swap_cgroup_record(ent, memcg); mem_cgroup_get(memcg); } + if (memcg) + css_put(&memcg->css); } #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |