This patch implements per-zone lru for memory cgroup. This patch makes use of mem_cgroup_per_zone struct for per zone lru.
LRU can be accessed by mz = mem_cgroup_zoneinfo(mem_cgroup, node, zone); &mz->active_list &mz->inactive_list or mz = page_cgroup_zoneinfo(page_cgroup); &mz->active_list &mz->inactive_list Changelog v1->v2 - merged to mem_cgroup_per_zone struct. - handle page migraiton. Signed-off-by: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]> mm/memcontrol.c | 63 ++++++++++++++++++++++++++++++++++---------------------- 1 file changed, 39 insertions(+), 24 deletions(-) Index: linux-2.6.24-rc3-mm1/mm/memcontrol.c =================================================================== --- linux-2.6.24-rc3-mm1.orig/mm/memcontrol.c 2007-11-27 11:24:04.000000000 +0900 +++ linux-2.6.24-rc3-mm1/mm/memcontrol.c 2007-11-27 11:24:16.000000000 +0900 @@ -89,6 +89,8 @@ }; 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 @@ /* * 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 @@ -367,10 +366,10 @@ 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); } @@ -388,11 +387,11 @@ 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); } } @@ -518,11 +517,16 @@ 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; @@ -544,13 +548,6 @@ 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); @@ -832,6 +829,8 @@ int count; unsigned long flags; + if (list_empty(list)) + return; retry: count = FORCE_UNCHARGE_BATCH; spin_lock_irqsave(&mem->lru_lock, flags); @@ -867,20 +866,27 @@ 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: @@ -1092,15 +1098,25 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node) { struct mem_cgroup_per_node *pn; + struct mem_cgroup_per_zone *mz; + int zone; pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, node); 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 struct mem_cgroup init_mem_cgroup; static struct cgroup_subsys_state * @@ -1119,8 +1135,7 @@ 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)); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/