From: Doug Berger <opendmb@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>, Mike Rapoport <rppt@kernel.org>,
Borislav Petkov <bp@suse.de>,
"Paul E. McKenney" <paulmck@kernel.org>,
Neeraj Upadhyay <quic_neeraju@quicinc.com>,
Randy Dunlap <rdunlap@infradead.org>,
Damien Le Moal <damien.lemoal@opensource.wdc.com>,
Muchun Song <songmuchun@bytedance.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>,
Mike Kravetz <mike.kravetz@oracle.com>,
Florian Fainelli <f.fainelli@gmail.com>,
David Hildenbrand <david@redhat.com>,
Oscar Salvador <osalvador@suse.de>,
Michal Hocko <mhocko@suse.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Doug Berger <opendmb@gmail.com>
Subject: [PATCH v2 3/9] mm/page_alloc: calculate node_spanned_pages from pfns
Date: Wed, 28 Sep 2022 15:32:55 -0700 [thread overview]
Message-ID: <20220928223301.375229-4-opendmb@gmail.com> (raw)
In-Reply-To: <20220928223301.375229-1-opendmb@gmail.com>
Since the start and end pfns of the node are passed as arguments
to calculate_node_totalpages() they might as well be used to
specify the node_spanned_pages value for the node rather than
accumulating the spans of member zones.
This prevents the need for additional adjustments if zones are
allowed to overlap.
Signed-off-by: Doug Berger <opendmb@gmail.com>
---
mm/page_alloc.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e5486d47406e..3412d644c230 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7452,7 +7452,7 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat,
unsigned long node_start_pfn,
unsigned long node_end_pfn)
{
- unsigned long realtotalpages = 0, totalpages = 0;
+ unsigned long realtotalpages = 0;
enum zone_type i;
for (i = 0; i < MAX_NR_ZONES; i++) {
@@ -7483,11 +7483,10 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat,
zone->present_early_pages = real_size;
#endif
- totalpages += size;
realtotalpages += real_size;
}
- pgdat->node_spanned_pages = totalpages;
+ pgdat->node_spanned_pages = node_end_pfn - node_start_pfn;
pgdat->node_present_pages = realtotalpages;
pr_debug("On node %d totalpages: %lu\n", pgdat->node_id, realtotalpages);
}
--
2.25.1
next prev parent reply other threads:[~2022-09-28 22:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-28 22:32 [PATCH v2 0/9] mm: introduce Designated Movable Blocks Doug Berger
2022-09-28 22:32 ` [PATCH v2 1/9] lib/show_mem.c: display MovableOnly Doug Berger
2022-09-28 22:32 ` [PATCH v2 2/9] mm/vmstat: show start_pfn when zone spans pages Doug Berger
2022-09-29 8:15 ` David Hildenbrand
2022-10-01 1:28 ` Doug Berger
2022-10-05 18:09 ` David Hildenbrand
2022-10-12 23:57 ` Doug Berger
2022-10-13 11:44 ` Michal Hocko
2022-09-28 22:32 ` Doug Berger [this message]
2022-09-28 22:32 ` [PATCH v2 4/9] mm/page_alloc.c: allow oversized movablecore Doug Berger
2022-09-28 22:32 ` [PATCH v2 5/9] mm/page_alloc: introduce init_reserved_pageblock() Doug Berger
2022-09-28 22:32 ` [PATCH v2 6/9] memblock: introduce MEMBLOCK_MOVABLE flag Doug Berger
2022-09-28 22:32 ` [PATCH v2 7/9] mm/dmb: Introduce Designated Movable Blocks Doug Berger
2022-09-28 22:33 ` [PATCH v2 8/9] mm/page_alloc: make alloc_contig_pages DMB aware Doug Berger
2022-09-28 22:33 ` [PATCH v2 9/9] mm/page_alloc: allow base for movablecore Doug Berger
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