diff options
| -rw-r--r-- | mm/memcontrol.c | 86 |
1 files changed, 58 insertions, 28 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 40cdba6..f728d67 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -89,6 +89,8 @@ enum mem_cgroup_zstat_index { }; struct mem_cgroup_per_zone { + struct list_head active_list; + struct list_head inactive_list; unsigned long count[NR_MEM_CGROUP_ZSTAT]; }; /* Macro for accessing counter */ @@ -122,10 +124,7 @@ struct mem_cgroup { /* * Per cgroup active and inactive list, similar to the * per zone LRU lists. - * TODO: Consider making these lists per zone */ - struct list_head active_list; - struct list_head inactive_list; struct mem_cgroup_lru_info info; /* * spin_lock to protect the per cgroup LRU @@ -366,10 +365,10 @@ static void __mem_cgroup_add_list(struct page_cgroup *pc) if (!to) { MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_INACTIVE) += 1; - list_add(&pc->lru, &pc->mem_cgroup->inactive_list); + list_add(&pc->lru, &mz->inactive_list); } else { MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_ACTIVE) += 1; - list_add(&pc->lru, &pc->mem_cgroup->active_list); + list_add(&pc->lru, &mz->active_list); } mem_cgroup_charge_statistics(pc->mem_cgroup, pc->flags, true); } @@ -387,11 +386,11 @@ static void __mem_cgroup_move_lists(struct page_cgroup *pc, bool active) if (active) { MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_ACTIVE) += 1; pc->flags |= PAGE_CGROUP_FLAG_ACTIVE; - list_move(&pc->lru, &pc->mem_cgroup->active_list); + list_move(&pc->lru, &mz->active_list); } else { MEM_CGROUP_ZSTAT(mz, MEM_CGROUP_ZSTAT_INACTIVE) += 1; pc->flags &= ~PAGE_CGROUP_FLAG_ACTIVE; - list_move(&pc->lru, &pc->mem_cgroup->inactive_list); + list_move(&pc->lru, &mz->inactive_list); } } @@ -517,11 +516,16 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, LIST_HEAD(pc_list); struct list_head *src; struct page_cgroup *pc, *tmp; + int nid = z->zone_pgdat->node_id; + int zid = zone_idx(z); + struct mem_cgroup_per_zone *mz; + mz = mem_cgroup_zoneinfo(mem_cont, nid, zid); if (active) - src = &mem_cont->active_list; + src = &mz->active_list; else - src = &mem_cont->inactive_list; + src = &mz->inactive_list; + spin_lock(&mem_cont->lru_lock); scan = 0; @@ -543,13 +547,6 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, continue; } - /* - * Reclaim, per zone - * TODO: make the active/inactive lists per zone - */ - if (page_zone(page) != z) - continue; - scan++; list_move(&pc->lru, &pc_list); @@ -826,6 +823,8 @@ mem_cgroup_force_empty_list(struct mem_cgroup *mem, struct list_head *list) int count; unsigned long flags; + if (list_empty(list)) + return; retry: count = FORCE_UNCHARGE_BATCH; spin_lock_irqsave(&mem->lru_lock, flags); @@ -859,20 +858,27 @@ retry: int mem_cgroup_force_empty(struct mem_cgroup *mem) { int ret = -EBUSY; + int node, zid; css_get(&mem->css); /* * page reclaim code (kswapd etc..) will move pages between ` * active_list <-> inactive_list while we don't take a lock. * So, we have to do loop here until all lists are empty. */ - while (!(list_empty(&mem->active_list) && - list_empty(&mem->inactive_list))) { + while (mem->res.usage > 0) { if (atomic_read(&mem->css.cgroup->count) > 0) goto out; - /* drop all page_cgroup in active_list */ - mem_cgroup_force_empty_list(mem, &mem->active_list); - /* drop all page_cgroup in inactive_list */ - mem_cgroup_force_empty_list(mem, &mem->inactive_list); + for_each_node_state(node, N_POSSIBLE) + for (zid = 0; zid < MAX_NR_ZONES; zid++) { + struct mem_cgroup_per_zone *mz; + mz = mem_cgroup_zoneinfo(mem, node, zid); + /* drop all page_cgroup in active_list */ + mem_cgroup_force_empty_list(mem, + &mz->active_list); + /* drop all page_cgroup in inactive_list */ + mem_cgroup_force_empty_list(mem, + &mz->inactive_list); + } } ret = 0; out: @@ -1084,15 +1090,40 @@ static struct cftype mem_cgroup_files[] = { static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node) { struct mem_cgroup_per_node *pn; - - pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, node); + struct mem_cgroup_per_zone *mz; + int zone; + /* + * This routine is called against possible nodes. + * But it's BUG to call kmalloc() against offline node. + * + * TODO: this routine can waste much memory for nodes which will + * never be onlined. It's better to use memory hotplug callback + * function. + */ + if (node_state(node, N_HIGH_MEMORY)) + pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, node); + else + pn = kmalloc(sizeof(*pn), GFP_KERNEL); if (!pn) return 1; + mem->info.nodeinfo[node] = pn; memset(pn, 0, sizeof(*pn)); + + for (zone = 0; zone < MAX_NR_ZONES; zone++) { + mz = &pn->zoneinfo[zone]; + INIT_LIST_HEAD(&mz->active_list); + INIT_LIST_HEAD(&mz->inactive_list); + } return 0; } +static void free_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node) +{ + kfree(mem->info.nodeinfo[node]); +} + + static struct mem_cgroup init_mem_cgroup; static struct cgroup_subsys_state * @@ -1111,8 +1142,7 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont) return NULL; res_counter_init(&mem->res); - INIT_LIST_HEAD(&mem->active_list); - INIT_LIST_HEAD(&mem->inactive_list); + spin_lock_init(&mem->lru_lock); mem->control_type = MEM_CGROUP_TYPE_ALL; memset(&mem->info, 0, sizeof(mem->info)); @@ -1124,7 +1154,7 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont) return &mem->css; free_out: for_each_node_state(node, N_POSSIBLE) - kfree(mem->info.nodeinfo[node]); + free_mem_cgroup_per_zone_info(mem, node); if (cont->parent != NULL) kfree(mem); return NULL; @@ -1144,7 +1174,7 @@ static void mem_cgroup_destroy(struct cgroup_subsys *ss, struct mem_cgroup *mem = mem_cgroup_from_cont(cont); for_each_node_state(node, N_POSSIBLE) - kfree(mem->info.nodeinfo[node]); + free_mem_cgroup_per_zone_info(mem, node); kfree(mem_cgroup_from_cont(cont)); } |
