Messages in this thread Patch in this message | | | From | Doug Berger <> | Subject | [PATCH v2 2/9] mm/vmstat: show start_pfn when zone spans pages | Date | Wed, 28 Sep 2022 15:32:54 -0700 |
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A zone that overlaps with another zone may span a range of pages that are not present. In this case, displaying the start_pfn of the zone allows the zone page range to be identified.
Signed-off-by: Doug Berger <opendmb@gmail.com> --- mm/vmstat.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/mm/vmstat.c b/mm/vmstat.c index 90af9a8572f5..e2f19f2b7615 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1717,6 +1717,11 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, /* If unpopulated, no other information is useful */ if (!populated_zone(zone)) { + /* Show start_pfn for empty overlapped zones */ + if (zone->spanned_pages) + seq_printf(m, + "\n start_pfn: %lu", + zone->zone_start_pfn); seq_putc(m, '\n'); return; } -- 2.25.1
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