The patch titled
Subject: lib/show_mem.c: use for_each_populated_zone() simplify code
has been added to the -mm mm-unstable branch. Its filename is
lib-show_memc-use-for_each_populated_zone-simplify-code.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-show_memc-use-for_each_populated_zone-simplify-code.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Yajun Deng <yajun.deng@xxxxxxxxx>
Subject: lib/show_mem.c: use for_each_populated_zone() simplify code
Date: Mon, 17 Apr 2023 11:52:26 +0800
__show_mem() needs to iterate over all zones that have memory, we can
simplify the code by using for_each_populated_zone().
Link: https://lkml.kernel.org/r/20230417035226.4013584-1-yajun.deng@xxxxxxxxx
Signed-off-by: Yajun Deng <yajun.deng@xxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/show_mem.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
--- a/lib/show_mem.c~lib-show_memc-use-for_each_populated_zone-simplify-code
+++ a/lib/show_mem.c
@@ -10,26 +10,19 @@
void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
{
- pg_data_t *pgdat;
unsigned long total = 0, reserved = 0, highmem = 0;
+ struct zone *zone;
printk("Mem-Info:\n");
__show_free_areas(filter, nodemask, max_zone_idx);
- for_each_online_pgdat(pgdat) {
- int zoneid;
+ for_each_populated_zone(zone) {
- for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
- struct zone *zone = &pgdat->node_zones[zoneid];
- if (!populated_zone(zone))
- continue;
-
- total += zone->present_pages;
- reserved += zone->present_pages - zone_managed_pages(zone);
-
- if (is_highmem_idx(zoneid))
- highmem += zone->present_pages;
- }
+ total += zone->present_pages;
+ reserved += zone->present_pages - zone_managed_pages(zone);
+
+ if (is_highmem(zone))
+ highmem += zone->present_pages;
}
printk("%lu pages RAM\n", total);
_
Patches currently in -mm which might be from yajun.deng@xxxxxxxxx are
lib-show_memc-use-for_each_populated_zone-simplify-code.patch
