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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.

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>
This commit is contained in:
Mel Gorman 2016-07-28 15:47:02 -07:00 committed by Linus Torvalds
parent 7cc30fcfd2
commit e2ecc8a79e
1 changed files with 24 additions and 0 deletions
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24
mm/vmstat.c
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@ -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! */
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"