diff options
| -rw-r--r-- | mm/memcontrol.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 750ed144995..ad7f36f676f 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1031,8 +1031,6 @@ void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru) mz = page_cgroup_zoneinfo(pc->mem_cgroup, page); /* huge page split is done under lru_lock. so, we have no races. */ MEM_CGROUP_ZSTAT(mz, lru) -= 1 << compound_order(page); - if (mem_cgroup_is_root(pc->mem_cgroup)) - return; VM_BUG_ON(list_empty(&pc->lru)); list_del_init(&pc->lru); } @@ -1057,13 +1055,11 @@ void mem_cgroup_rotate_reclaimable_page(struct page *page) return; pc = lookup_page_cgroup(page); - /* unused or root page is not rotated. */ + /* unused page is not rotated. */ if (!PageCgroupUsed(pc)) return; /* Ensure pc->mem_cgroup is visible after reading PCG_USED. */ smp_rmb(); - if (mem_cgroup_is_root(pc->mem_cgroup)) - return; mz = page_cgroup_zoneinfo(pc->mem_cgroup, page); list_move_tail(&pc->lru, &mz->lists[lru]); } @@ -1077,13 +1073,11 @@ void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru) return; pc = lookup_page_cgroup(page); - /* unused or root page is not rotated. */ + /* unused page is not rotated. */ if (!PageCgroupUsed(pc)) return; /* Ensure pc->mem_cgroup is visible after reading PCG_USED. */ smp_rmb(); - if (mem_cgroup_is_root(pc->mem_cgroup)) - return; mz = page_cgroup_zoneinfo(pc->mem_cgroup, page); list_move(&pc->lru, &mz->lists[lru]); } @@ -1115,8 +1109,6 @@ void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru) /* huge page split is done under lru_lock. so, we have no races. */ MEM_CGROUP_ZSTAT(mz, lru) += 1 << compound_order(page); SetPageCgroupAcctLRU(pc); - if (mem_cgroup_is_root(pc->mem_cgroup)) - return; list_add(&pc->lru, &mz->lists[lru]); } |