From: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Subject: 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. Link: http://lkml.kernel.org/r/1467970510-21195-34-git-send-email-mgorman@xxxxxxxxxxxxxxxxxxx Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Acked-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/vmstat.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff -puN mm/vmstat.c~mm-vmstat-print-node-based-stats-in-zoneinfo-file mm/vmstat.c --- a/mm/vmstat.c~mm-vmstat-print-node-based-stats-in-zoneinfo-file +++ a/mm/vmstat.c @@ -1415,11 +1415,35 @@ static const struct file_operations page .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! */ + WARN_ON_ONCE(1); + 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)); + } + } seq_printf(m, "\n pages free %lu" "\n min %lu" _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
