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authorJohannes Weiner <hannes@cmpxchg.org>2017-05-04 00:55:13 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-04 01:52:11 +0300
commit71cd31135d4cf030a057ed7079a75a40c0a4a796 (patch)
treec95c8da1e70c21e412d9ab7328fc414ecfb80451 /mm/memcontrol.c
parentdf0e53d0619e83b465e363c088bf4eeb2848273b (diff)
downloadlinux-71cd31135d4cf030a057ed7079a75a40c0a4a796.tar.xz
mm: memcontrol: re-use node VM page state enum
The current duplication is a high-maintenance mess, and it's painful to add new items or query memcg state from the rest of the VM. This increases the size of the stat array marginally, but we should aim to track all these stats on a per-cgroup level anyway. Link: http://lkml.kernel.org/r/20170404220148.28338-3-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c135
1 files changed, 68 insertions, 67 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6b42887e5f14..6fe4c7fafbfc 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -100,18 +100,7 @@ static bool do_memsw_account(void)
return !cgroup_subsys_on_dfl(memory_cgrp_subsys) && do_swap_account;
}
-static const char * const mem_cgroup_stat_names[] = {
- "cache",
- "rss",
- "rss_huge",
- "shmem",
- "mapped_file",
- "dirty",
- "writeback",
- "swap",
-};
-
-static const char * const mem_cgroup_lru_names[] = {
+static const char *const mem_cgroup_lru_names[] = {
"inactive_anon",
"active_anon",
"inactive_file",
@@ -583,20 +572,16 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
* counted as CACHE even if it's on ANON LRU.
*/
if (PageAnon(page))
- __this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_RSS],
- nr_pages);
+ __this_cpu_add(memcg->stat->count[MEMCG_RSS], nr_pages);
else {
- __this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_CACHE],
- nr_pages);
+ __this_cpu_add(memcg->stat->count[MEMCG_CACHE], nr_pages);
if (PageSwapBacked(page))
- __this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_SHMEM],
- nr_pages);
+ __this_cpu_add(memcg->stat->count[NR_SHMEM], nr_pages);
}
if (compound) {
VM_BUG_ON_PAGE(!PageTransHuge(page), page);
- __this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_RSS_HUGE],
- nr_pages);
+ __this_cpu_add(memcg->stat->count[MEMCG_RSS_HUGE], nr_pages);
}
/* pagein of a big page is an event. So, ignore page size */
@@ -1125,6 +1110,28 @@ static bool mem_cgroup_wait_acct_move(struct mem_cgroup *memcg)
return false;
}
+unsigned int memcg1_stats[] = {
+ MEMCG_CACHE,
+ MEMCG_RSS,
+ MEMCG_RSS_HUGE,
+ NR_SHMEM,
+ NR_FILE_MAPPED,
+ NR_FILE_DIRTY,
+ NR_WRITEBACK,
+ MEMCG_SWAP,
+};
+
+static const char *const memcg1_stat_names[] = {
+ "cache",
+ "rss",
+ "rss_huge",
+ "shmem",
+ "mapped_file",
+ "dirty",
+ "writeback",
+ "swap",
+};
+
#define K(x) ((x) << (PAGE_SHIFT-10))
/**
* mem_cgroup_print_oom_info: Print OOM information relevant to memory controller.
@@ -1169,11 +1176,11 @@ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
pr_cont_cgroup_path(iter->css.cgroup);
pr_cont(":");
- for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
- if (i == MEM_CGROUP_STAT_SWAP && !do_swap_account)
+ for (i = 0; i < ARRAY_SIZE(memcg1_stats); i++) {
+ if (memcg1_stats[i] == MEMCG_SWAP && !do_swap_account)
continue;
- pr_cont(" %s:%luKB", mem_cgroup_stat_names[i],
- K(mem_cgroup_read_stat(iter, i)));
+ pr_cont(" %s:%luKB", memcg1_stat_names[i],
+ K(mem_cgroup_read_stat(iter, memcg1_stats[i])));
}
for (i = 0; i < NR_LRU_LISTS; i++)
@@ -2362,7 +2369,7 @@ void mem_cgroup_split_huge_fixup(struct page *head)
for (i = 1; i < HPAGE_PMD_NR; i++)
head[i].mem_cgroup = head->mem_cgroup;
- __this_cpu_sub(head->mem_cgroup->stat->count[MEM_CGROUP_STAT_RSS_HUGE],
+ __this_cpu_sub(head->mem_cgroup->stat->count[MEMCG_RSS_HUGE],
HPAGE_PMD_NR);
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
@@ -2372,7 +2379,7 @@ static void mem_cgroup_swap_statistics(struct mem_cgroup *memcg,
bool charge)
{
int val = (charge) ? 1 : -1;
- this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_SWAP], val);
+ this_cpu_add(memcg->stat->count[MEMCG_SWAP], val);
}
/**
@@ -2731,13 +2738,10 @@ static unsigned long mem_cgroup_usage(struct mem_cgroup *memcg, bool swap)
struct mem_cgroup *iter;
for_each_mem_cgroup_tree(iter, memcg) {
- val += mem_cgroup_read_stat(iter,
- MEM_CGROUP_STAT_CACHE);
- val += mem_cgroup_read_stat(iter,
- MEM_CGROUP_STAT_RSS);
+ val += mem_cgroup_read_stat(iter, MEMCG_CACHE);
+ val += mem_cgroup_read_stat(iter, MEMCG_RSS);
if (swap)
- val += mem_cgroup_read_stat(iter,
- MEM_CGROUP_STAT_SWAP);
+ val += mem_cgroup_read_stat(iter, MEMCG_SWAP);
}
} else {
if (!swap)
@@ -3134,15 +3138,15 @@ static int memcg_stat_show(struct seq_file *m, void *v)
struct mem_cgroup *mi;
unsigned int i;
- BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_stat_names) !=
- MEM_CGROUP_STAT_NSTATS);
+ BUILD_BUG_ON(ARRAY_SIZE(memcg1_stat_names) != ARRAY_SIZE(memcg1_stats));
BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS);
- for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
- if (i == MEM_CGROUP_STAT_SWAP && !do_memsw_account())
+ for (i = 0; i < ARRAY_SIZE(memcg1_stats); i++) {
+ if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account())
continue;
- seq_printf(m, "%s %lu\n", mem_cgroup_stat_names[i],
- mem_cgroup_read_stat(memcg, i) * PAGE_SIZE);
+ seq_printf(m, "%s %lu\n", memcg1_stat_names[i],
+ mem_cgroup_read_stat(memcg, memcg1_stats[i]) *
+ PAGE_SIZE);
}
for (i = 0; i < ARRAY_SIZE(memcg1_events); i++)
@@ -3165,14 +3169,15 @@ static int memcg_stat_show(struct seq_file *m, void *v)
seq_printf(m, "hierarchical_memsw_limit %llu\n",
(u64)memsw * PAGE_SIZE);
- for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
+ for (i = 0; i < ARRAY_SIZE(memcg1_stats); i++) {
unsigned long long val = 0;
- if (i == MEM_CGROUP_STAT_SWAP && !do_memsw_account())
+ if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account())
continue;
for_each_mem_cgroup_tree(mi, memcg)
- val += mem_cgroup_read_stat(mi, i) * PAGE_SIZE;
- seq_printf(m, "total_%s %llu\n", mem_cgroup_stat_names[i], val);
+ val += mem_cgroup_read_stat(mi, memcg1_stats[i]) *
+ PAGE_SIZE;
+ seq_printf(m, "total_%s %llu\n", memcg1_stat_names[i], val);
}
for (i = 0; i < ARRAY_SIZE(memcg1_events); i++) {
@@ -3645,10 +3650,10 @@ void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
struct mem_cgroup *memcg = mem_cgroup_from_css(wb->memcg_css);
struct mem_cgroup *parent;
- *pdirty = mem_cgroup_read_stat(memcg, MEM_CGROUP_STAT_DIRTY);
+ *pdirty = mem_cgroup_read_stat(memcg, NR_FILE_DIRTY);
/* this should eventually include NR_UNSTABLE_NFS */
- *pwriteback = mem_cgroup_read_stat(memcg, MEM_CGROUP_STAT_WRITEBACK);
+ *pwriteback = mem_cgroup_read_stat(memcg, NR_WRITEBACK);
*pfilepages = mem_cgroup_nr_lru_pages(memcg, (1 << LRU_INACTIVE_FILE) |
(1 << LRU_ACTIVE_FILE));
*pheadroom = PAGE_COUNTER_MAX;
@@ -4504,10 +4509,8 @@ static int mem_cgroup_move_account(struct page *page,
spin_lock_irqsave(&from->move_lock, flags);
if (!anon && page_mapped(page)) {
- __this_cpu_sub(from->stat->count[MEM_CGROUP_STAT_FILE_MAPPED],
- nr_pages);
- __this_cpu_add(to->stat->count[MEM_CGROUP_STAT_FILE_MAPPED],
- nr_pages);
+ __this_cpu_sub(from->stat->count[NR_FILE_MAPPED], nr_pages);
+ __this_cpu_add(to->stat->count[NR_FILE_MAPPED], nr_pages);
}
/*
@@ -4519,18 +4522,16 @@ static int mem_cgroup_move_account(struct page *page,
struct address_space *mapping = page_mapping(page);
if (mapping_cap_account_dirty(mapping)) {
- __this_cpu_sub(from->stat->count[MEM_CGROUP_STAT_DIRTY],
+ __this_cpu_sub(from->stat->count[NR_FILE_DIRTY],
nr_pages);
- __this_cpu_add(to->stat->count[MEM_CGROUP_STAT_DIRTY],
+ __this_cpu_add(to->stat->count[NR_FILE_DIRTY],
nr_pages);
}
}
if (PageWriteback(page)) {
- __this_cpu_sub(from->stat->count[MEM_CGROUP_STAT_WRITEBACK],
- nr_pages);
- __this_cpu_add(to->stat->count[MEM_CGROUP_STAT_WRITEBACK],
- nr_pages);
+ __this_cpu_sub(from->stat->count[NR_WRITEBACK], nr_pages);
+ __this_cpu_add(to->stat->count[NR_WRITEBACK], nr_pages);
}
/*
@@ -5190,9 +5191,9 @@ static int memory_stat_show(struct seq_file *m, void *v)
tree_events(memcg, events);
seq_printf(m, "anon %llu\n",
- (u64)stat[MEM_CGROUP_STAT_RSS] * PAGE_SIZE);
+ (u64)stat[MEMCG_RSS] * PAGE_SIZE);
seq_printf(m, "file %llu\n",
- (u64)stat[MEM_CGROUP_STAT_CACHE] * PAGE_SIZE);
+ (u64)stat[MEMCG_CACHE] * PAGE_SIZE);
seq_printf(m, "kernel_stack %llu\n",
(u64)stat[MEMCG_KERNEL_STACK_KB] * 1024);
seq_printf(m, "slab %llu\n",
@@ -5202,13 +5203,13 @@ static int memory_stat_show(struct seq_file *m, void *v)
(u64)stat[MEMCG_SOCK] * PAGE_SIZE);
seq_printf(m, "shmem %llu\n",
- (u64)stat[MEM_CGROUP_STAT_SHMEM] * PAGE_SIZE);
+ (u64)stat[NR_SHMEM] * PAGE_SIZE);
seq_printf(m, "file_mapped %llu\n",
- (u64)stat[MEM_CGROUP_STAT_FILE_MAPPED] * PAGE_SIZE);
+ (u64)stat[NR_FILE_MAPPED] * PAGE_SIZE);
seq_printf(m, "file_dirty %llu\n",
- (u64)stat[MEM_CGROUP_STAT_DIRTY] * PAGE_SIZE);
+ (u64)stat[NR_FILE_DIRTY] * PAGE_SIZE);
seq_printf(m, "file_writeback %llu\n",
- (u64)stat[MEM_CGROUP_STAT_WRITEBACK] * PAGE_SIZE);
+ (u64)stat[NR_WRITEBACK] * PAGE_SIZE);
for (i = 0; i < NR_LRU_LISTS; i++) {
struct mem_cgroup *mi;
@@ -5231,11 +5232,11 @@ static int memory_stat_show(struct seq_file *m, void *v)
seq_printf(m, "pgmajfault %lu\n", events[PGMAJFAULT]);
seq_printf(m, "workingset_refault %lu\n",
- stat[MEMCG_WORKINGSET_REFAULT]);
+ stat[WORKINGSET_REFAULT]);
seq_printf(m, "workingset_activate %lu\n",
- stat[MEMCG_WORKINGSET_ACTIVATE]);
+ stat[WORKINGSET_ACTIVATE]);
seq_printf(m, "workingset_nodereclaim %lu\n",
- stat[MEMCG_WORKINGSET_NODERECLAIM]);
+ stat[WORKINGSET_NODERECLAIM]);
return 0;
}
@@ -5492,10 +5493,10 @@ static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout,
}
local_irq_save(flags);
- __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS], nr_anon);
- __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_CACHE], nr_file);
- __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_RSS_HUGE], nr_huge);
- __this_cpu_sub(memcg->stat->count[MEM_CGROUP_STAT_SHMEM], nr_shmem);
+ __this_cpu_sub(memcg->stat->count[MEMCG_RSS], nr_anon);
+ __this_cpu_sub(memcg->stat->count[MEMCG_CACHE], nr_file);
+ __this_cpu_sub(memcg->stat->count[MEMCG_RSS_HUGE], nr_huge);
+ __this_cpu_sub(memcg->stat->count[NR_SHMEM], nr_shmem);
__this_cpu_add(memcg->stat->events[PGPGOUT], pgpgout);
__this_cpu_add(memcg->stat->nr_page_events, nr_pages);
memcg_check_events(memcg, dummy_page);