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@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@surriel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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mm/vmstat.c
24
mm/vmstat.c
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@ -1415,11 +1415,35 @@ static const struct file_operations pagetypeinfo_file_ops = {
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.release = seq_release,
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.release = seq_release,
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};
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};
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static bool is_zone_first_populated(pg_data_t *pgdat, struct zone *zone)
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{
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int zid;
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for (zid = 0; zid < MAX_NR_ZONES; zid++) {
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struct zone *compare = &pgdat->node_zones[zid];
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if (populated_zone(compare))
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return zone == compare;
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}
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/* The zone must be somewhere! */
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WARN_ON_ONCE(1);
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return false;
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}
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static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
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static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
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struct zone *zone)
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struct zone *zone)
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{
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{
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int i;
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int i;
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seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name);
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seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name);
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if (is_zone_first_populated(pgdat, zone)) {
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seq_printf(m, "\n per-node stats");
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for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
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seq_printf(m, "\n %-12s %lu",
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vmstat_text[i + NR_VM_ZONE_STAT_ITEMS],
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node_page_state(pgdat, i));
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}
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}
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seq_printf(m,
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seq_printf(m,
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"\n pages free %lu"
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"\n pages free %lu"
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"\n min %lu"
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"\n min %lu"
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