static void mem_cgroup_threshold(struct mem_cgroup *mem);
static void mem_cgroup_oom_notify(struct mem_cgroup *mem);
+enum {
+ SCAN_BY_LIMIT,
+ SCAN_BY_SYSTEM,
+ NR_SCAN_CONTEXT,
+ SCAN_BY_SHRINK, /* not recorded now */
+};
+
+enum {
+ SCAN,
+ SCAN_ANON,
+ SCAN_FILE,
+ ROTATE,
+ ROTATE_ANON,
+ ROTATE_FILE,
+ FREED,
+ FREED_ANON,
+ FREED_FILE,
+ ELAPSED,
+ NR_SCANSTATS,
+};
+
+struct scanstat {
+ spinlock_t lock;
+ unsigned long stats[NR_SCAN_CONTEXT][NR_SCANSTATS];
+ unsigned long rootstats[NR_SCAN_CONTEXT][NR_SCANSTATS];
+};
+
+const char *scanstat_string[NR_SCANSTATS] = {
+ "scanned_pages",
+ "scanned_anon_pages",
+ "scanned_file_pages",
+ "rotated_pages",
+ "rotated_anon_pages",
+ "rotated_file_pages",
+ "freed_pages",
+ "freed_anon_pages",
+ "freed_file_pages",
+ "elapsed_ns",
+};
+#define SCANSTAT_WORD_LIMIT "_by_limit"
+#define SCANSTAT_WORD_SYSTEM "_by_system"
+#define SCANSTAT_WORD_HIERARCHY "_under_hierarchy"
+
+
/*
* The memory controller data structure. The memory controller controls both
* page cache and RSS per cgroup. We would eventually like to provide
* Should the accounting and control be hierarchical, per subtree?
*/
bool use_hierarchy;
- atomic_t oom_lock;
+
+ bool oom_lock;
+ atomic_t under_oom;
+
atomic_t refcnt;
- unsigned int swappiness;
+ int swappiness;
/* OOM-Killer disable */
int oom_kill_disable;
/* For oom notifier event fd */
struct list_head oom_notify;
-
+ /* For recording LRU-scan statistics */
+ struct scanstat scanstat;
/*
* Should we move charges of a task when a task is moved into this
* mem_cgroup ? And what type of charges should we move ?
preempt_enable();
}
-static unsigned long
-mem_cgroup_get_zonestat_node(struct mem_cgroup *mem, int nid, enum lru_list idx)
+unsigned long
+mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *mem, int nid, int zid,
+ unsigned int lru_mask)
{
struct mem_cgroup_per_zone *mz;
+ enum lru_list l;
+ unsigned long ret = 0;
+
+ mz = mem_cgroup_zoneinfo(mem, nid, zid);
+
+ for_each_lru(l) {
+ if (BIT(l) & lru_mask)
+ ret += MEM_CGROUP_ZSTAT(mz, l);
+ }
+ return ret;
+}
+
+static unsigned long
+mem_cgroup_node_nr_lru_pages(struct mem_cgroup *mem,
+ int nid, unsigned int lru_mask)
+{
u64 total = 0;
int zid;
- for (zid = 0; zid < MAX_NR_ZONES; zid++) {
- mz = mem_cgroup_zoneinfo(mem, nid, zid);
- total += MEM_CGROUP_ZSTAT(mz, idx);
- }
+ for (zid = 0; zid < MAX_NR_ZONES; zid++)
+ total += mem_cgroup_zone_nr_lru_pages(mem, nid, zid, lru_mask);
+
return total;
}
-static unsigned long mem_cgroup_get_local_zonestat(struct mem_cgroup *mem,
- enum lru_list idx)
+
+static unsigned long mem_cgroup_nr_lru_pages(struct mem_cgroup *mem,
+ unsigned int lru_mask)
{
int nid;
u64 total = 0;
- for_each_online_node(nid)
- total += mem_cgroup_get_zonestat_node(mem, nid, idx);
+ for_each_node_state(nid, N_HIGH_MEMORY)
+ total += mem_cgroup_node_nr_lru_pages(mem, nid, lru_mask);
return total;
}
unsigned long gb;
unsigned long inactive_ratio;
- inactive = mem_cgroup_get_local_zonestat(memcg, LRU_INACTIVE_ANON);
- active = mem_cgroup_get_local_zonestat(memcg, LRU_ACTIVE_ANON);
+ inactive = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_INACTIVE_ANON));
+ active = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_ACTIVE_ANON));
gb = (inactive + active) >> (30 - PAGE_SHIFT);
if (gb)
unsigned long active;
unsigned long inactive;
- inactive = mem_cgroup_get_local_zonestat(memcg, LRU_INACTIVE_FILE);
- active = mem_cgroup_get_local_zonestat(memcg, LRU_ACTIVE_FILE);
+ inactive = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_INACTIVE_FILE));
+ active = mem_cgroup_nr_lru_pages(memcg, BIT(LRU_ACTIVE_FILE));
return (active > inactive);
}
-unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
- struct zone *zone,
- enum lru_list lru)
-{
- int nid = zone_to_nid(zone);
- int zid = zone_idx(zone);
- struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid);
-
- return MEM_CGROUP_ZSTAT(mz, lru);
-}
-
-static unsigned long mem_cgroup_node_nr_file_lru_pages(struct mem_cgroup *memcg,
- int nid)
-{
- unsigned long ret;
-
- ret = mem_cgroup_get_zonestat_node(memcg, nid, LRU_INACTIVE_FILE) +
- mem_cgroup_get_zonestat_node(memcg, nid, LRU_ACTIVE_FILE);
-
- return ret;
-}
-
-static unsigned long mem_cgroup_node_nr_anon_lru_pages(struct mem_cgroup *memcg,
- int nid)
-{
- unsigned long ret;
-
- ret = mem_cgroup_get_zonestat_node(memcg, nid, LRU_INACTIVE_ANON) +
- mem_cgroup_get_zonestat_node(memcg, nid, LRU_ACTIVE_ANON);
- return ret;
-}
-
-#if MAX_NUMNODES > 1
-static unsigned long mem_cgroup_nr_file_lru_pages(struct mem_cgroup *memcg)
-{
- u64 total = 0;
- int nid;
-
- for_each_node_state(nid, N_HIGH_MEMORY)
- total += mem_cgroup_node_nr_file_lru_pages(memcg, nid);
-
- return total;
-}
-
-static unsigned long mem_cgroup_nr_anon_lru_pages(struct mem_cgroup *memcg)
-{
- u64 total = 0;
- int nid;
-
- for_each_node_state(nid, N_HIGH_MEMORY)
- total += mem_cgroup_node_nr_anon_lru_pages(memcg, nid);
-
- return total;
-}
-
-static unsigned long
-mem_cgroup_node_nr_unevictable_lru_pages(struct mem_cgroup *memcg, int nid)
-{
- return mem_cgroup_get_zonestat_node(memcg, nid, LRU_UNEVICTABLE);
-}
-
-static unsigned long
-mem_cgroup_nr_unevictable_lru_pages(struct mem_cgroup *memcg)
-{
- u64 total = 0;
- int nid;
-
- for_each_node_state(nid, N_HIGH_MEMORY)
- total += mem_cgroup_node_nr_unevictable_lru_pages(memcg, nid);
-
- return total;
-}
-
-static unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg,
- int nid)
-{
- enum lru_list l;
- u64 total = 0;
-
- for_each_lru(l)
- total += mem_cgroup_get_zonestat_node(memcg, nid, l);
-
- return total;
-}
-
-static unsigned long mem_cgroup_nr_lru_pages(struct mem_cgroup *memcg)
-{
- u64 total = 0;
- int nid;
-
- for_each_node_state(nid, N_HIGH_MEMORY)
- total += mem_cgroup_node_nr_lru_pages(memcg, nid);
-
- return total;
-}
-#endif /* CONFIG_NUMA */
-
struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
struct zone *zone)
{
return margin >> PAGE_SHIFT;
}
-static unsigned int get_swappiness(struct mem_cgroup *memcg)
+int mem_cgroup_swappiness(struct mem_cgroup *memcg)
{
struct cgroup *cgrp = memcg->css.cgroup;
static bool test_mem_cgroup_node_reclaimable(struct mem_cgroup *mem,
int nid, bool noswap)
{
- if (mem_cgroup_node_nr_file_lru_pages(mem, nid))
+ if (mem_cgroup_node_nr_lru_pages(mem, nid, LRU_ALL_FILE))
return true;
if (noswap || !total_swap_pages)
return false;
- if (mem_cgroup_node_nr_anon_lru_pages(mem, nid))
+ if (mem_cgroup_node_nr_lru_pages(mem, nid, LRU_ALL_ANON))
return true;
return false;
}
#endif
+static void __mem_cgroup_record_scanstat(unsigned long *stats,
+ struct memcg_scanrecord *rec)
+{
+
+ stats[SCAN] += rec->nr_scanned[0] + rec->nr_scanned[1];
+ stats[SCAN_ANON] += rec->nr_scanned[0];
+ stats[SCAN_FILE] += rec->nr_scanned[1];
+
+ stats[ROTATE] += rec->nr_rotated[0] + rec->nr_rotated[1];
+ stats[ROTATE_ANON] += rec->nr_rotated[0];
+ stats[ROTATE_FILE] += rec->nr_rotated[1];
+
+ stats[FREED] += rec->nr_freed[0] + rec->nr_freed[1];
+ stats[FREED_ANON] += rec->nr_freed[0];
+ stats[FREED_FILE] += rec->nr_freed[1];
+
+ stats[ELAPSED] += rec->elapsed;
+}
+
+static void mem_cgroup_record_scanstat(struct memcg_scanrecord *rec)
+{
+ struct mem_cgroup *mem;
+ int context = rec->context;
+
+ if (context >= NR_SCAN_CONTEXT)
+ return;
+
+ mem = rec->mem;
+ spin_lock(&mem->scanstat.lock);
+ __mem_cgroup_record_scanstat(mem->scanstat.stats[context], rec);
+ spin_unlock(&mem->scanstat.lock);
+
+ mem = rec->root;
+ spin_lock(&mem->scanstat.lock);
+ __mem_cgroup_record_scanstat(mem->scanstat.rootstats[context], rec);
+ spin_unlock(&mem->scanstat.lock);
+}
+
/*
* Scan the hierarchy if needed to reclaim memory. We remember the last child
* we reclaimed from, so that we don't end up penalizing one child extensively
bool noswap = reclaim_options & MEM_CGROUP_RECLAIM_NOSWAP;
bool shrink = reclaim_options & MEM_CGROUP_RECLAIM_SHRINK;
bool check_soft = reclaim_options & MEM_CGROUP_RECLAIM_SOFT;
+ struct memcg_scanrecord rec;
unsigned long excess;
- unsigned long nr_scanned;
+ unsigned long scanned;
excess = res_counter_soft_limit_excess(&root_mem->res) >> PAGE_SHIFT;
/* If memsw_is_minimum==1, swap-out is of-no-use. */
- if (!check_soft && root_mem->memsw_is_minimum)
+ if (!check_soft && !shrink && root_mem->memsw_is_minimum)
noswap = true;
+ if (shrink)
+ rec.context = SCAN_BY_SHRINK;
+ else if (check_soft)
+ rec.context = SCAN_BY_SYSTEM;
+ else
+ rec.context = SCAN_BY_LIMIT;
+
+ rec.root = root_mem;
+
while (1) {
victim = mem_cgroup_select_victim(root_mem);
if (victim == root_mem) {
css_put(&victim->css);
continue;
}
+ rec.mem = victim;
+ rec.nr_scanned[0] = 0;
+ rec.nr_scanned[1] = 0;
+ rec.nr_rotated[0] = 0;
+ rec.nr_rotated[1] = 0;
+ rec.nr_freed[0] = 0;
+ rec.nr_freed[1] = 0;
+ rec.elapsed = 0;
/* we use swappiness of local cgroup */
if (check_soft) {
ret = mem_cgroup_shrink_node_zone(victim, gfp_mask,
- noswap, get_swappiness(victim), zone,
- &nr_scanned);
- *total_scanned += nr_scanned;
+ noswap, zone, &rec, &scanned);
+ *total_scanned += scanned;
} else
ret = try_to_free_mem_cgroup_pages(victim, gfp_mask,
- noswap, get_swappiness(victim));
+ noswap, &rec);
+ mem_cgroup_record_scanstat(&rec);
css_put(&victim->css);
/*
* At shrinking usage, we can't check we should stop here or
/*
* Check OOM-Killer is already running under our hierarchy.
* If someone is running, return false.
+ * Has to be called with memcg_oom_lock
*/
static bool mem_cgroup_oom_lock(struct mem_cgroup *mem)
{
- int x, lock_count = 0;
- struct mem_cgroup *iter;
+ int lock_count = -1;
+ struct mem_cgroup *iter, *failed = NULL;
+ bool cond = true;
- for_each_mem_cgroup_tree(iter, mem) {
- x = atomic_inc_return(&iter->oom_lock);
- lock_count = max(x, lock_count);
+ for_each_mem_cgroup_tree_cond(iter, mem, cond) {
+ bool locked = iter->oom_lock;
+
+ iter->oom_lock = true;
+ if (lock_count == -1)
+ lock_count = iter->oom_lock;
+ else if (lock_count != locked) {
+ /*
+ * this subtree of our hierarchy is already locked
+ * so we cannot give a lock.
+ */
+ lock_count = 0;
+ failed = iter;
+ cond = false;
+ }
}
- if (lock_count == 1)
- return true;
- return false;
+ if (!failed)
+ goto done;
+
+ /*
+ * OK, we failed to lock the whole subtree so we have to clean up
+ * what we set up to the failing subtree
+ */
+ cond = true;
+ for_each_mem_cgroup_tree_cond(iter, mem, cond) {
+ if (iter == failed) {
+ cond = false;
+ continue;
+ }
+ iter->oom_lock = false;
+ }
+done:
+ return lock_count;
}
+/*
+ * Has to be called with memcg_oom_lock
+ */
static int mem_cgroup_oom_unlock(struct mem_cgroup *mem)
{
struct mem_cgroup *iter;
+ for_each_mem_cgroup_tree(iter, mem)
+ iter->oom_lock = false;
+ return 0;
+}
+
+static void mem_cgroup_mark_under_oom(struct mem_cgroup *mem)
+{
+ struct mem_cgroup *iter;
+
+ for_each_mem_cgroup_tree(iter, mem)
+ atomic_inc(&iter->under_oom);
+}
+
+static void mem_cgroup_unmark_under_oom(struct mem_cgroup *mem)
+{
+ struct mem_cgroup *iter;
+
/*
* When a new child is created while the hierarchy is under oom,
* mem_cgroup_oom_lock() may not be called. We have to use
* atomic_add_unless() here.
*/
for_each_mem_cgroup_tree(iter, mem)
- atomic_add_unless(&iter->oom_lock, -1, 0);
- return 0;
+ atomic_add_unless(&iter->under_oom, -1, 0);
}
-
-static DEFINE_MUTEX(memcg_oom_mutex);
+static DEFINE_SPINLOCK(memcg_oom_lock);
static DECLARE_WAIT_QUEUE_HEAD(memcg_oom_waitq);
struct oom_wait_info {
static void memcg_oom_recover(struct mem_cgroup *mem)
{
- if (mem && atomic_read(&mem->oom_lock))
+ if (mem && atomic_read(&mem->under_oom))
memcg_wakeup_oom(mem);
}
owait.wait.private = current;
INIT_LIST_HEAD(&owait.wait.task_list);
need_to_kill = true;
+ mem_cgroup_mark_under_oom(mem);
+
/* At first, try to OOM lock hierarchy under mem.*/
- mutex_lock(&memcg_oom_mutex);
+ spin_lock(&memcg_oom_lock);
locked = mem_cgroup_oom_lock(mem);
/*
* Even if signal_pending(), we can't quit charge() loop without
need_to_kill = false;
if (locked)
mem_cgroup_oom_notify(mem);
- mutex_unlock(&memcg_oom_mutex);
+ spin_unlock(&memcg_oom_lock);
if (need_to_kill) {
finish_wait(&memcg_oom_waitq, &owait.wait);
schedule();
finish_wait(&memcg_oom_waitq, &owait.wait);
}
- mutex_lock(&memcg_oom_mutex);
- mem_cgroup_oom_unlock(mem);
+ spin_lock(&memcg_oom_lock);
+ if (locked)
+ mem_cgroup_oom_unlock(mem);
memcg_wakeup_oom(mem);
- mutex_unlock(&memcg_oom_mutex);
+ spin_unlock(&memcg_oom_lock);
+
+ mem_cgroup_unmark_under_oom(mem);
if (test_thread_flag(TIF_MEMDIE) || fatal_signal_pending(current))
return false;
struct memcg_stock_pcp *stock = &per_cpu(memcg_stock, cpu);
struct mem_cgroup *mem;
- if (cpu == curcpu)
- continue;
-
mem = stock->cached;
- if (!mem)
+ if (!mem || !stock->nr_pages)
continue;
if (mem != root_mem) {
if (!root_mem->use_hierarchy)
if (!css_is_ancestor(&mem->css, &root_mem->css))
continue;
}
- if (!test_and_set_bit(FLUSHING_CACHED_CHARGE, &stock->flags))
- schedule_work_on(cpu, &stock->work);
+ if (!test_and_set_bit(FLUSHING_CACHED_CHARGE, &stock->flags)) {
+ if (cpu == curcpu)
+ drain_local_stock(&stock->work);
+ else
+ schedule_work_on(cpu, &stock->work);
+ }
}
put_online_cpus();
mutex_unlock(&percpu_charge_mutex);
/* try to free all pages in this cgroup */
shrink = 1;
while (nr_retries && mem->res.usage > 0) {
+ struct memcg_scanrecord rec;
int progress;
if (signal_pending(current)) {
ret = -EINTR;
goto out;
}
+ rec.context = SCAN_BY_SHRINK;
+ rec.mem = mem;
+ rec.root = mem;
progress = try_to_free_mem_cgroup_pages(mem, GFP_KERNEL,
- false, get_swappiness(mem));
+ false, &rec);
if (!progress) {
nr_retries--;
/* maybe some writeback is necessary */
s->stat[MCS_PGMAJFAULT] += val;
/* per zone stat */
- val = mem_cgroup_get_local_zonestat(mem, LRU_INACTIVE_ANON);
+ val = mem_cgroup_nr_lru_pages(mem, BIT(LRU_INACTIVE_ANON));
s->stat[MCS_INACTIVE_ANON] += val * PAGE_SIZE;
- val = mem_cgroup_get_local_zonestat(mem, LRU_ACTIVE_ANON);
+ val = mem_cgroup_nr_lru_pages(mem, BIT(LRU_ACTIVE_ANON));
s->stat[MCS_ACTIVE_ANON] += val * PAGE_SIZE;
- val = mem_cgroup_get_local_zonestat(mem, LRU_INACTIVE_FILE);
+ val = mem_cgroup_nr_lru_pages(mem, BIT(LRU_INACTIVE_FILE));
s->stat[MCS_INACTIVE_FILE] += val * PAGE_SIZE;
- val = mem_cgroup_get_local_zonestat(mem, LRU_ACTIVE_FILE);
+ val = mem_cgroup_nr_lru_pages(mem, BIT(LRU_ACTIVE_FILE));
s->stat[MCS_ACTIVE_FILE] += val * PAGE_SIZE;
- val = mem_cgroup_get_local_zonestat(mem, LRU_UNEVICTABLE);
+ val = mem_cgroup_nr_lru_pages(mem, BIT(LRU_UNEVICTABLE));
s->stat[MCS_UNEVICTABLE] += val * PAGE_SIZE;
}
struct cgroup *cont = m->private;
struct mem_cgroup *mem_cont = mem_cgroup_from_cont(cont);
- total_nr = mem_cgroup_nr_lru_pages(mem_cont);
+ total_nr = mem_cgroup_nr_lru_pages(mem_cont, LRU_ALL);
seq_printf(m, "total=%lu", total_nr);
for_each_node_state(nid, N_HIGH_MEMORY) {
- node_nr = mem_cgroup_node_nr_lru_pages(mem_cont, nid);
+ node_nr = mem_cgroup_node_nr_lru_pages(mem_cont, nid, LRU_ALL);
seq_printf(m, " N%d=%lu", nid, node_nr);
}
seq_putc(m, '\n');
- file_nr = mem_cgroup_nr_file_lru_pages(mem_cont);
+ file_nr = mem_cgroup_nr_lru_pages(mem_cont, LRU_ALL_FILE);
seq_printf(m, "file=%lu", file_nr);
for_each_node_state(nid, N_HIGH_MEMORY) {
- node_nr = mem_cgroup_node_nr_file_lru_pages(mem_cont, nid);
+ node_nr = mem_cgroup_node_nr_lru_pages(mem_cont, nid,
+ LRU_ALL_FILE);
seq_printf(m, " N%d=%lu", nid, node_nr);
}
seq_putc(m, '\n');
- anon_nr = mem_cgroup_nr_anon_lru_pages(mem_cont);
+ anon_nr = mem_cgroup_nr_lru_pages(mem_cont, LRU_ALL_ANON);
seq_printf(m, "anon=%lu", anon_nr);
for_each_node_state(nid, N_HIGH_MEMORY) {
- node_nr = mem_cgroup_node_nr_anon_lru_pages(mem_cont, nid);
+ node_nr = mem_cgroup_node_nr_lru_pages(mem_cont, nid,
+ LRU_ALL_ANON);
seq_printf(m, " N%d=%lu", nid, node_nr);
}
seq_putc(m, '\n');
- unevictable_nr = mem_cgroup_nr_unevictable_lru_pages(mem_cont);
+ unevictable_nr = mem_cgroup_nr_lru_pages(mem_cont, BIT(LRU_UNEVICTABLE));
seq_printf(m, "unevictable=%lu", unevictable_nr);
for_each_node_state(nid, N_HIGH_MEMORY) {
- node_nr = mem_cgroup_node_nr_unevictable_lru_pages(mem_cont,
- nid);
+ node_nr = mem_cgroup_node_nr_lru_pages(mem_cont, nid,
+ BIT(LRU_UNEVICTABLE));
seq_printf(m, " N%d=%lu", nid, node_nr);
}
seq_putc(m, '\n');
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
- return get_swappiness(memcg);
+ return mem_cgroup_swappiness(memcg);
}
static int mem_cgroup_swappiness_write(struct cgroup *cgrp, struct cftype *cft,
if (!event)
return -ENOMEM;
- mutex_lock(&memcg_oom_mutex);
+ spin_lock(&memcg_oom_lock);
event->eventfd = eventfd;
list_add(&event->list, &memcg->oom_notify);
/* already in OOM ? */
- if (atomic_read(&memcg->oom_lock))
+ if (atomic_read(&memcg->under_oom))
eventfd_signal(eventfd, 1);
- mutex_unlock(&memcg_oom_mutex);
+ spin_unlock(&memcg_oom_lock);
return 0;
}
BUG_ON(type != _OOM_TYPE);
- mutex_lock(&memcg_oom_mutex);
+ spin_lock(&memcg_oom_lock);
list_for_each_entry_safe(ev, tmp, &mem->oom_notify, list) {
if (ev->eventfd == eventfd) {
}
}
- mutex_unlock(&memcg_oom_mutex);
+ spin_unlock(&memcg_oom_lock);
}
static int mem_cgroup_oom_control_read(struct cgroup *cgrp,
cb->fill(cb, "oom_kill_disable", mem->oom_kill_disable);
- if (atomic_read(&mem->oom_lock))
+ if (atomic_read(&mem->under_oom))
cb->fill(cb, "under_oom", 1);
else
cb->fill(cb, "under_oom", 0);
}
#endif /* CONFIG_NUMA */
+static int mem_cgroup_vmscan_stat_read(struct cgroup *cgrp,
+ struct cftype *cft,
+ struct cgroup_map_cb *cb)
+{
+ struct mem_cgroup *mem = mem_cgroup_from_cont(cgrp);
+ char string[64];
+ int i;
+
+ for (i = 0; i < NR_SCANSTATS; i++) {
+ strcpy(string, scanstat_string[i]);
+ strcat(string, SCANSTAT_WORD_LIMIT);
+ cb->fill(cb, string, mem->scanstat.stats[SCAN_BY_LIMIT][i]);
+ }
+
+ for (i = 0; i < NR_SCANSTATS; i++) {
+ strcpy(string, scanstat_string[i]);
+ strcat(string, SCANSTAT_WORD_SYSTEM);
+ cb->fill(cb, string, mem->scanstat.stats[SCAN_BY_SYSTEM][i]);
+ }
+
+ for (i = 0; i < NR_SCANSTATS; i++) {
+ strcpy(string, scanstat_string[i]);
+ strcat(string, SCANSTAT_WORD_LIMIT);
+ strcat(string, SCANSTAT_WORD_HIERARCHY);
+ cb->fill(cb, string, mem->scanstat.rootstats[SCAN_BY_LIMIT][i]);
+ }
+ for (i = 0; i < NR_SCANSTATS; i++) {
+ strcpy(string, scanstat_string[i]);
+ strcat(string, SCANSTAT_WORD_SYSTEM);
+ strcat(string, SCANSTAT_WORD_HIERARCHY);
+ cb->fill(cb, string, mem->scanstat.rootstats[SCAN_BY_SYSTEM][i]);
+ }
+ return 0;
+}
+
+static int mem_cgroup_reset_vmscan_stat(struct cgroup *cgrp,
+ unsigned int event)
+{
+ struct mem_cgroup *mem = mem_cgroup_from_cont(cgrp);
+
+ spin_lock(&mem->scanstat.lock);
+ memset(&mem->scanstat.stats, 0, sizeof(mem->scanstat.stats));
+ memset(&mem->scanstat.rootstats, 0, sizeof(mem->scanstat.rootstats));
+ spin_unlock(&mem->scanstat.lock);
+ return 0;
+}
+
+
static struct cftype mem_cgroup_files[] = {
{
.name = "usage_in_bytes",
.mode = S_IRUGO,
},
#endif
+ {
+ .name = "vmscan_stat",
+ .read_map = mem_cgroup_vmscan_stat_read,
+ .trigger = mem_cgroup_reset_vmscan_stat,
+ },
};
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
INIT_LIST_HEAD(&mem->oom_notify);
if (parent)
- mem->swappiness = get_swappiness(parent);
+ mem->swappiness = mem_cgroup_swappiness(parent);
atomic_set(&mem->refcnt, 1);
mem->move_charge_at_immigrate = 0;
mutex_init(&mem->thresholds_lock);
+ spin_lock_init(&mem->scanstat.lock);
return &mem->css;
free_out:
__mem_cgroup_free(mem);
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff