Commit e2ecc8a7 authored by Mel Gorman's avatar Mel Gorman Committed by Linus Torvalds
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mm, vmstat: print node-based stats in zoneinfo file

There are a number of stats that were previously accessible via zoneinfo
that are now invisible.  While it is possible to create a new file for
the node stats, this may be missed by users.  Instead this patch prints
the stats under the first populated zone in /proc/zoneinfo.


Signed-off-by: default avatarMel Gorman <>
Acked-by: default avatarHillf Danton <>
Acked-by: default avatarJohannes Weiner <>
Acked-by: default avatarVlastimil Babka <>
Cc: Joonsoo Kim <>
Cc: Michal Hocko <>
Cc: Minchan Kim <>
Cc: Rik van Riel <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 7cc30fcf
......@@ -1415,11 +1415,35 @@ static const struct file_operations pagetypeinfo_file_ops = {
.release = seq_release,
static bool is_zone_first_populated(pg_data_t *pgdat, struct zone *zone)
int zid;
for (zid = 0; zid < MAX_NR_ZONES; zid++) {
struct zone *compare = &pgdat->node_zones[zid];
if (populated_zone(compare))
return zone == compare;
/* The zone must be somewhere! */
return false;
static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
struct zone *zone)
int i;
seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name);
if (is_zone_first_populated(pgdat, zone)) {
seq_printf(m, "\n per-node stats");
for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
seq_printf(m, "\n %-12s %lu",
vmstat_text[i + NR_VM_ZONE_STAT_ITEMS],
node_page_state(pgdat, i));
"\n pages free %lu"
"\n min %lu"
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