diff options
| author | Song Hu <husong@kylinos.cn> | 2025-09-30 12:21:52 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-17 04:28:01 +0300 |
| commit | ca30ac479e6cf7a210dcad32fa2ee99ca0357e91 (patch) | |
| tree | 3821642ebd1a748a7a7add74f6efc33ca584f2b6 | |
| parent | 9686080d627ae95e9a60de29518c07843aad3f77 (diff) | |
| download | linux-ca30ac479e6cf7a210dcad32fa2ee99ca0357e91.tar.xz | |
mm/page_owner: simplify zone iteration logic in init_early_allocated_pages()
The current implementation uses nested loops: first iterating over all
online nodes, then over zones within each node. This can be simplified by
using the for_each_populated_zone() macro which directly iterates through
all populated zones.
This change:
1. Removes the intermediate init_zones_in_node() function
2. Simplifies init_early_allocated_pages() to use direct zone iteration
3. Updates init_pages_in_zone() to take only zone parameter and access
node_id via zone->zone_pgdat
The functionality remains identical, but the code is cleaner and more
maintainable.
Link: https://lkml.kernel.org/r/20250930092153.843109-2-husong@kylinos.cn
Signed-off-by: Song Hu <husong@kylinos.cn>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Ye Liu <liuye@kylinos.cn>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/page_owner.c | 23 |
1 files changed, 5 insertions, 18 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index 8ebc2de1c110..a70245684206 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -769,7 +769,7 @@ static loff_t lseek_page_owner(struct file *file, loff_t offset, int orig) return file->f_pos; } -static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone) +static void init_pages_in_zone(struct zone *zone) { unsigned long pfn = zone->zone_start_pfn; unsigned long end_pfn = zone_end_pfn(zone); @@ -836,28 +836,15 @@ ext_put_continue: } pr_info("Node %d, zone %8s: page owner found early allocated %lu pages\n", - pgdat->node_id, zone->name, count); -} - -static void init_zones_in_node(pg_data_t *pgdat) -{ - struct zone *zone; - struct zone *node_zones = pgdat->node_zones; - - for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) { - if (!populated_zone(zone)) - continue; - - init_pages_in_zone(pgdat, zone); - } + zone->zone_pgdat->node_id, zone->name, count); } static void init_early_allocated_pages(void) { - pg_data_t *pgdat; + struct zone *zone; - for_each_online_pgdat(pgdat) - init_zones_in_node(pgdat); + for_each_populated_zone(zone) + init_pages_in_zone(zone); } static const struct file_operations page_owner_fops = { |