The patch titled
Subject: mm, vmstat: suppress pcp stats for unpopulated zones in zoneinfo
has been added to the -mm tree. Its filename is
mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo.patch
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------------------------------------------------------
From: David Rientjes <rientjes@xxxxxxxxxx>
Subject: mm, vmstat: suppress pcp stats for unpopulated zones in zoneinfo
After "mm, vmstat: print non-populated zones in zoneinfo", /proc/zoneinfo
will show unpopulated zones.
The per-cpu pageset statistics are not relevant for unpopulated zones and
can be potentially lengthy, so supress them when they are not interesting.
Also moves lowmem reserve protection information above pcp stats since it
is relevant for all zones per vm.lowmem_reserve_ratio.
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1703061400500.46428@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff -puN mm/vmstat.c~mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo mm/vmstat.c
--- a/mm/vmstat.c~mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo
+++ a/mm/vmstat.c
@@ -1393,18 +1393,24 @@ static void zoneinfo_show_print(struct s
zone->present_pages,
zone->managed_pages);
- for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
- seq_printf(m, "\n %-12s %lu", vmstat_text[i],
- zone_page_state(zone, i));
-
seq_printf(m,
"\n protection: (%ld",
zone->lowmem_reserve[0]);
for (i = 1; i < ARRAY_SIZE(zone->lowmem_reserve); i++)
seq_printf(m, ", %ld", zone->lowmem_reserve[i]);
- seq_printf(m,
- ")"
- "\n pagesets");
+ seq_putc(m, ')');
+
+ /* If unpopulated, no other information is useful */
+ if (!populated_zone(zone)) {
+ seq_putc(m, '\n');
+ return;
+ }
+
+ for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
+ seq_printf(m, "\n %-12s %lu", vmstat_text[i],
+ zone_page_state(zone, i));
+
+ seq_printf(m, "\n pagesets");
for_each_online_cpu(i) {
struct per_cpu_pageset *pageset;
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
mm-vmstat-print-non-populated-zones-in-zoneinfo.patch
mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo.patch
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