From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Berger Subject: [PATCH 08/21] mm/vmstat: show start_pfn when zone spans pages Date: Tue, 13 Sep 2022 12:54:55 -0700 Message-ID: <20220913195508.3511038-9-opendmb@gmail.com> References: <20220913195508.3511038-1-opendmb@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=6/+RylwAUS1L6kGkdbzNevLkV7SCUovxqo9fjOaS6JU=; b=IIvzQBml/wGri/ZBWsuig4iC5yLnXMtk1VHesQ1eh/9HzasiMgV8YxfdpWHpGIoYep M/INFOPjeTVC3OEHHCjy2E1Hs8kTN4G53N8xRA/QBMd1ulJjTypxrYcp9Vasl1Q/eOJB qHAj6LLFWCEJm7FVRIifJLn+g0xAhtpqiGJt/0Lazj8LpFDzEnyQtx4bqcugERvtsdZG jeSnKtUCKGP4SXlnb3HB7CkPQRbT8a6KgjjUz3Q32zw4SQOfC5UckDKNJQGxML3W3hgv kauff9Q/Ua47CAvmWSZZgrFSzvsXxKLS/PIpqLn25rigG7/KetjxEqCiT7a4LgLAH6NO U6Ng== In-Reply-To: <20220913195508.3511038-1-opendmb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-ID: Content-Type: text/plain; charset="us-ascii" To: Andrew Morton Cc: Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Frank Rowand , Mike Kravetz , Muchun Song , Mike Rapoport , Christoph Hellwig , Marek Szyprowski , Robin Murphy , Borislav Petkov , "Paul E. McKenney" , Neeraj Upadhyay , Randy Dunlap , Damien Le Moal , Doug Berger , Florian Fainelli , David Hildenbrand , Zi Yan , Oscar Salvador 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 --- 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