diff options
| author |   Baoquan He <bhe@redhat.com> | 2020-06-03 15:58:55 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-03 20:09:44 -0700 |
| commit | 26e7deadaae1755faf1f6d1a68988c4b8348df59 (patch) | |
| tree | 735b0c627ffbff28bb0286198007548ec65de028 /mm/vmstat.c | |
| parent | mm/page_alloc.c: clear out zone->lowmem_reserve[] if the zone is empty (diff) | |
| download | wireguard-linux-26e7deadaae1755faf1f6d1a68988c4b8348df59.tar.xz wireguard-linux-26e7deadaae1755faf1f6d1a68988c4b8348df59.zip | |
mm/vmstat.c: do not show lowmem reserve protection information of empty zone
Because the lowmem reserve protection of a zone can't tell anything if the
zone is empty, except of adding one more line in /proc/zoneinfo.
Let's remove it from that zone's showing.
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200402140113.3696-4-bhe@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 5e241434cab2..068706a0a1a7 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1592,6 +1592,12 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, zone->present_pages, zone_managed_pages(zone)); + /* If unpopulated, no other information is useful */ + if (!populated_zone(zone)) { + seq_putc(m, '\n'); + return; + } + seq_printf(m, "\n protection: (%ld", zone->lowmem_reserve[0]); @@ -1599,12 +1605,6 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, seq_printf(m, ", %ld", zone->lowmem_reserve[i]); 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", zone_stat_name(i), zone_page_state(zone, i)); |