From 78ccf5b5ab834080db25d8128e7dd33594cbf4df Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Tue, 29 May 2012 15:07:06 -0700 Subject: [PATCH] mm: memcg: print statistics directly to seq_file Being able to use seq_printf() allows being smarter about statistics name strings, which are currently listed twice, with the only difference being a "total_" prefix on the hierarchical version. Signed-off-by: Johannes Weiner Acked-by: Michal Hocko Acked-by: KAMEZAWA Hiroyuki Cc: Ying Han Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 55 ++++++++++++++++++++++++------------------------- 1 file changed, 27 insertions(+), 28 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ba9e1b131b4d..4200f5c59579 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4060,26 +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", + "pgpgin", + "pgpgout", + "swap", + "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) { @@ -4175,7 +4171,7 @@ static int mem_control_numa_stat_show(struct cgroup *cont, struct cftype *cft, #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; @@ -4188,16 +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)); @@ -4205,7 +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 @@ -4226,10 +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 @@ -4663,7 +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", -- 2.20.1