diff options
| author | Haifeng Xu <haifeng.xu@shopee.com> | 2023-05-26 11:52:51 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-10 02:25:49 +0300 |
| commit | 1c2d252f5b4289e1c6840bcf394157b70c639d6e (patch) | |
| tree | 2424ac14c12d4095bbb52ec9eae3925cf0e0dc06 /mm/mm_init.c | |
| parent | ba1b67c79cb3c5f5d11cb475bb7045929b235538 (diff) | |
| download | linux-1c2d252f5b4289e1c6840bcf394157b70c639d6e.tar.xz | |
mm/mm_init.c: do not calculate zone_start_pfn/zone_end_pfn in zone_absent_pages_in_node()
In calculate_node_totalpages(), zone_start_pfn/zone_end_pfn are already
calculated in zone_spanned_pages_in_node(), so use them as parameters
instead of node_start_pfn/node_end_pfn and the duplicated calculation
process can de dropped.
Link: https://lkml.kernel.org/r/20230526085251.1977-2-haifeng.xu@shopee.com
Signed-off-by: Haifeng Xu <haifeng.xu@shopee.com>
Suggested-by: Mike Rapoport <rppt@kernel.org>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Haifeng Xu <haifeng.xu@shopee.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mm_init.c')
| -rw-r--r-- | mm/mm_init.c | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/mm/mm_init.c b/mm/mm_init.c index 6f7da396b67b..19652c1b3426 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1168,20 +1168,15 @@ unsigned long __init absent_pages_in_range(unsigned long start_pfn, /* Return the number of page frames in holes in a zone on a node */ static unsigned long __init zone_absent_pages_in_node(int nid, unsigned long zone_type, - unsigned long node_start_pfn, - unsigned long node_end_pfn) + unsigned long zone_start_pfn, + unsigned long zone_end_pfn) { - unsigned long zone_low = arch_zone_lowest_possible_pfn[zone_type]; - unsigned long zone_high = arch_zone_highest_possible_pfn[zone_type]; - unsigned long zone_start_pfn, zone_end_pfn; unsigned long nr_absent; - zone_start_pfn = clamp(node_start_pfn, zone_low, zone_high); - zone_end_pfn = clamp(node_end_pfn, zone_low, zone_high); + /* zone is empty, we don't have any absent pages */ + if (zone_start_pfn == zone_end_pfn) + return 0; - adjust_zone_range_for_zone_movable(nid, zone_type, - node_start_pfn, node_end_pfn, - &zone_start_pfn, &zone_end_pfn); nr_absent = __absent_pages_in_range(nid, zone_start_pfn, zone_end_pfn); /* @@ -1274,7 +1269,7 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat, struct zone *zone = pgdat->node_zones + i; unsigned long zone_start_pfn, zone_end_pfn; unsigned long spanned, absent; - unsigned long size, real_size; + unsigned long real_size; spanned = zone_spanned_pages_in_node(pgdat->node_id, i, node_start_pfn, @@ -1282,23 +1277,22 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat, &zone_start_pfn, &zone_end_pfn); absent = zone_absent_pages_in_node(pgdat->node_id, i, - node_start_pfn, - node_end_pfn); + zone_start_pfn, + zone_end_pfn); - size = spanned; - real_size = size - absent; + real_size = spanned - absent; - if (size) + if (spanned) zone->zone_start_pfn = zone_start_pfn; else zone->zone_start_pfn = 0; - zone->spanned_pages = size; + zone->spanned_pages = spanned; zone->present_pages = real_size; #if defined(CONFIG_MEMORY_HOTPLUG) zone->present_early_pages = real_size; #endif - totalpages += size; + totalpages += spanned; realtotalpages += real_size; } |