mm: memcg: group swapped-out statistics counter logically
[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / memcontrol.c
index 37bae55..1118e02 100644 (file)
@@ -88,14 +88,12 @@ enum mem_cgroup_stat_index {
        MEM_CGROUP_STAT_RSS,       /* # of pages charged as anon rss */
        MEM_CGROUP_STAT_FILE_MAPPED,  /* # of pages charged as file rss */
        MEM_CGROUP_STAT_SWAPOUT, /* # of pages, swapped out */
-       MEM_CGROUP_STAT_DATA, /* end of data requires synchronization */
        MEM_CGROUP_STAT_NSTATS,
 };
 
 enum mem_cgroup_events_index {
        MEM_CGROUP_EVENTS_PGPGIN,       /* # of pages paged in */
        MEM_CGROUP_EVENTS_PGPGOUT,      /* # of pages paged out */
-       MEM_CGROUP_EVENTS_COUNT,        /* # of pages paged in/out */
        MEM_CGROUP_EVENTS_PGFAULT,      /* # of page-faults */
        MEM_CGROUP_EVENTS_PGMAJFAULT,   /* # of major page-faults */
        MEM_CGROUP_EVENTS_NSTATS,
@@ -119,6 +117,7 @@ enum mem_cgroup_events_target {
 struct mem_cgroup_stat_cpu {
        long count[MEM_CGROUP_STAT_NSTATS];
        unsigned long events[MEM_CGROUP_EVENTS_NSTATS];
+       unsigned long nr_page_events;
        unsigned long targets[MEM_CGROUP_NTARGETS];
 };
 
@@ -717,7 +716,7 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
                nr_pages = -nr_pages; /* for event */
        }
 
-       __this_cpu_add(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT], nr_pages);
+       __this_cpu_add(memcg->stat->nr_page_events, nr_pages);
 
        preempt_enable();
 }
@@ -778,7 +777,7 @@ static bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg,
 {
        unsigned long val, next;
 
-       val = __this_cpu_read(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT]);
+       val = __this_cpu_read(memcg->stat->nr_page_events);
        next = __this_cpu_read(memcg->stat->targets[target]);
        /* from time_after() in jiffies.h */
        if ((long)next - (long)val < 0) {
@@ -2135,7 +2134,7 @@ static void mem_cgroup_drain_pcp_counter(struct mem_cgroup *memcg, int cpu)
        int i;
 
        spin_lock(&memcg->pcp_counter_lock);
-       for (i = 0; i < MEM_CGROUP_STAT_DATA; i++) {
+       for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) {
                long x = per_cpu(memcg->stat->count[i], cpu);
 
                per_cpu(memcg->stat->count[i], cpu) = 0;
@@ -4044,9 +4043,9 @@ enum {
        MCS_CACHE,
        MCS_RSS,
        MCS_FILE_MAPPED,
+       MCS_SWAP,
        MCS_PGPGIN,
        MCS_PGPGOUT,
-       MCS_SWAP,
        MCS_PGFAULT,
        MCS_PGMAJFAULT,
        MCS_INACTIVE_ANON,
@@ -4061,26 +4060,22 @@ struct mcs_total_stat {
        s64 stat[NR_MCS_STAT];
 };
 
-static struct {
-       char *local_name;
-       char *total_name;
-} memcg_stat_strings[NR_MCS_STAT] = {
-       {"cache", "total_cache"},
-       {"rss", "total_rss"},
-       {"mapped_file", "total_mapped_file"},
-       {"pgpgin", "total_pgpgin"},
-       {"pgpgout", "total_pgpgout"},
-       {"swap", "total_swap"},
-       {"pgfault", "total_pgfault"},
-       {"pgmajfault", "total_pgmajfault"},
-       {"inactive_anon", "total_inactive_anon"},
-       {"active_anon", "total_active_anon"},
-       {"inactive_file", "total_inactive_file"},
-       {"active_file", "total_active_file"},
-       {"unevictable", "total_unevictable"}
+static const char *memcg_stat_strings[NR_MCS_STAT] = {
+       "cache",
+       "rss",
+       "mapped_file",
+       "swap",
+       "pgpgin",
+       "pgpgout",
+       "pgfault",
+       "pgmajfault",
+       "inactive_anon",
+       "active_anon",
+       "inactive_file",
+       "active_file",
+       "unevictable",
 };
 
-
 static void
 mem_cgroup_get_local_stat(struct mem_cgroup *memcg, struct mcs_total_stat *s)
 {
@@ -4129,12 +4124,12 @@ mem_cgroup_get_total_stat(struct mem_cgroup *memcg, struct mcs_total_stat *s)
 }
 
 #ifdef CONFIG_NUMA
-static int mem_control_numa_stat_show(struct seq_file *m, void *arg)
+static int mem_control_numa_stat_show(struct cgroup *cont, struct cftype *cft,
+                                     struct seq_file *m)
 {
        int nid;
        unsigned long total_nr, file_nr, anon_nr, unevictable_nr;
        unsigned long node_nr;
-       struct cgroup *cont = m->private;
        struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
 
        total_nr = mem_cgroup_nr_lru_pages(memcg, LRU_ALL);
@@ -4176,7 +4171,7 @@ static int mem_control_numa_stat_show(struct seq_file *m, void *arg)
 #endif /* CONFIG_NUMA */
 
 static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
-                                struct cgroup_map_cb *cb)
+                                struct seq_file *m)
 {
        struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
        struct mcs_total_stat mystat;
@@ -4189,16 +4184,18 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
        for (i = 0; i < NR_MCS_STAT; i++) {
                if (i == MCS_SWAP && !do_swap_account)
                        continue;
-               cb->fill(cb, memcg_stat_strings[i].local_name, mystat.stat[i]);
+               seq_printf(m, "%s %llu\n", memcg_stat_strings[i],
+                          (unsigned long long)mystat.stat[i]);
        }
 
        /* Hierarchical information */
        {
                unsigned long long limit, memsw_limit;
                memcg_get_hierarchical_limit(memcg, &limit, &memsw_limit);
-               cb->fill(cb, "hierarchical_memory_limit", limit);
+               seq_printf(m, "hierarchical_memory_limit %llu\n", limit);
                if (do_swap_account)
-                       cb->fill(cb, "hierarchical_memsw_limit", memsw_limit);
+                       seq_printf(m, "hierarchical_memsw_limit %llu\n",
+                                  memsw_limit);
        }
 
        memset(&mystat, 0, sizeof(mystat));
@@ -4206,7 +4203,8 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
        for (i = 0; i < NR_MCS_STAT; i++) {
                if (i == MCS_SWAP && !do_swap_account)
                        continue;
-               cb->fill(cb, memcg_stat_strings[i].total_name, mystat.stat[i]);
+               seq_printf(m, "total_%s %llu\n", memcg_stat_strings[i],
+                          (unsigned long long)mystat.stat[i]);
        }
 
 #ifdef CONFIG_DEBUG_VM
@@ -4227,10 +4225,10 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
                                recent_scanned[0] += rstat->recent_scanned[0];
                                recent_scanned[1] += rstat->recent_scanned[1];
                        }
-               cb->fill(cb, "recent_rotated_anon", recent_rotated[0]);
-               cb->fill(cb, "recent_rotated_file", recent_rotated[1]);
-               cb->fill(cb, "recent_scanned_anon", recent_scanned[0]);
-               cb->fill(cb, "recent_scanned_file", recent_scanned[1]);
+               seq_printf(m, "recent_rotated_anon %lu\n", recent_rotated[0]);
+               seq_printf(m, "recent_rotated_file %lu\n", recent_rotated[1]);
+               seq_printf(m, "recent_scanned_anon %lu\n", recent_scanned[0]);
+               seq_printf(m, "recent_scanned_file %lu\n", recent_scanned[1]);
        }
 #endif
 
@@ -4609,22 +4607,6 @@ static int mem_cgroup_oom_control_write(struct cgroup *cgrp,
        return 0;
 }
 
-#ifdef CONFIG_NUMA
-static const struct file_operations mem_control_numa_stat_file_operations = {
-       .read = seq_read,
-       .llseek = seq_lseek,
-       .release = single_release,
-};
-
-static int mem_control_numa_stat_open(struct inode *unused, struct file *file)
-{
-       struct cgroup *cont = file->f_dentry->d_parent->d_fsdata;
-
-       file->f_op = &mem_control_numa_stat_file_operations;
-       return single_open(file, mem_control_numa_stat_show, cont);
-}
-#endif /* CONFIG_NUMA */
-
 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
 static int memcg_init_kmem(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
 {
@@ -4680,7 +4662,7 @@ static struct cftype mem_cgroup_files[] = {
        },
        {
                .name = "stat",
-               .read_map = mem_control_stat_show,
+               .read_seq_string = mem_control_stat_show,
        },
        {
                .name = "force_empty",
@@ -4712,8 +4694,7 @@ static struct cftype mem_cgroup_files[] = {
 #ifdef CONFIG_NUMA
        {
                .name = "numa_stat",
-               .open = mem_control_numa_stat_open,
-               .mode = S_IRUGO,
+               .read_seq_string = mem_control_numa_stat_show,
        },
 #endif
 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP