From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qv1-f54.google.com (mail-qv1-f54.google.com [209.85.219.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3289266E8 for ; Tue, 13 Sep 2022 19:58:25 +0000 (UTC) Received: by mail-qv1-f54.google.com with SMTP id d1so10132054qvs.0 for ; Tue, 13 Sep 2022 12:58:25 -0700 (PDT) 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== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=6/+RylwAUS1L6kGkdbzNevLkV7SCUovxqo9fjOaS6JU=; b=jZxfwDuOW3IUMcWRoZJA3xK9tRB17DgTTThsl8+QiADejoYl0wTPKlClSx0wi46m6J 1bowrSKnw5TwuECsUE2xJUoEkIlt2a1NS6O5JAjSc0xjGbZpgpNxomZTNRhVxwuy2T/h vfhWngfGGTeXabYgEYKXUA8df8JM5WcK3rdH8E0wJKmn9TvsAurmH4c+tvHxQ4WV68Ib 5xyQm1s39nipH2PcwBZW1o4oun4YqHu+yAC0mXP58tgWqmhZ+D+P6ySOJDkXrBqXlAO1 P38leDQEqtRuwNBUP0QQjSVPV4j/7fSROzbfbHRXIVbfQOX9YF+ReldDf548BjJ8INr1 3C4Q== X-Gm-Message-State: ACgBeo1LbZuNgCo0Ta+9mxWV/LrrfWOMR9+0tYhEdGD/koYi6WUkyg1K NfBJJBDHFgggedta5UCRzbA= X-Google-Smtp-Source: AA6agR7HhxHAKHSAet4vBy7WKGiBHiOPyi3Gu3lpC/Y1Ix8I/hDUvAWKeNeCYEL5N+Wcelu80g5S7w== X-Received: by 2002:a0c:d987:0:b0:4a5:192c:faff with SMTP id y7-20020a0cd987000000b004a5192cfaffmr29341373qvj.106.1663099104077; Tue, 13 Sep 2022 12:58:24 -0700 (PDT) Received: from stbirv-lnx-3.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id s11-20020a05620a29cb00b006b8e049cf08sm276305qkp.2.2022.09.13.12.58.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Sep 2022 12:58:23 -0700 (PDT) From: Doug Berger 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 , Hari Bathini , Kees Cook , - , KOSAKI Motohiro , Mel Gorman , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev 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> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220913195508.3511038-1-opendmb@gmail.com> References: <20220913195508.3511038-1-opendmb@gmail.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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