The patch titled
Subject: mm/vmstat.c: do not show lowmem reserve protection information of empty zone
has been added to the -mm tree. Its filename is
mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone.patch
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------------------------------------------------------
From: Baoquan He <bhe@xxxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200402140113.3696-4-bhe@xxxxxxxxxx
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/mm/vmstat.c~mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone
+++ a/mm/vmstat.c
@@ -1590,6 +1590,12 @@ static void zoneinfo_show_print(struct s
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]);
@@ -1597,12 +1603,6 @@ static void zoneinfo_show_print(struct s
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));
_
Patches currently in -mm which might be from bhe@xxxxxxxxxx are
mm-memmap_init-iterate-over-memblock-regions-rather-that-check-each-pfn.patch
mm-remove-unused-free_bootmem_with_active_regions.patch
mm-page_allocc-only-tune-sysctl_lowmem_reserve_ratio-value-once-when-changing-it.patch
mm-page_allocc-clear-out-zone-lowmem_reserve-if-the-zone-is-empty.patch
mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone.patch
