From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f72.google.com (mail-lf0-f72.google.com [209.85.215.72]) by kanga.kvack.org (Postfix) with ESMTP id 25C34828F6 for ; Fri, 8 Jul 2016 05:41:01 -0400 (EDT) Received: by mail-lf0-f72.google.com with SMTP id a2so27030238lfe.0 for ; Fri, 08 Jul 2016 02:41:01 -0700 (PDT) Received: from outbound-smtp07.blacknight.com (outbound-smtp07.blacknight.com. [46.22.139.12]) by mx.google.com with ESMTPS id r4si2400263wjl.234.2016.07.08.02.40.59 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 08 Jul 2016 02:41:00 -0700 (PDT) Received: from mail.blacknight.com (pemlinmail01.blacknight.ie [81.17.254.10]) by outbound-smtp07.blacknight.com (Postfix) with ESMTPS id 8FCA61C24EA for ; Fri, 8 Jul 2016 10:40:59 +0100 (IST) From: Mel Gorman Subject: [PATCH 33/34] mm, vmstat: print node-based stats in zoneinfo file Date: Fri, 8 Jul 2016 10:35:09 +0100 Message-Id: <1467970510-21195-34-git-send-email-mgorman@techsingularity.net> In-Reply-To: <1467970510-21195-1-git-send-email-mgorman@techsingularity.net> References: <1467970510-21195-1-git-send-email-mgorman@techsingularity.net> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Linux-MM Cc: Rik van Riel , Vlastimil Babka , Johannes Weiner , Minchan Kim , Joonsoo Kim , LKML , Mel Gorman There are a number of stats that were previously accessible via zoneinfo that are now invisible. While it is possible to create a new file for the node stats, this may be missed by users. Instead this patch prints the stats under the first populated zone in /proc/zoneinfo. Signed-off-by: Mel Gorman Acked-by: Hillf Danton --- mm/vmstat.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/mm/vmstat.c b/mm/vmstat.c index af070cf5e762..60372f31fee3 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1415,11 +1415,35 @@ static const struct file_operations pagetypeinfo_file_ops = { .release = seq_release, }; +static bool is_zone_first_populated(pg_data_t *pgdat, struct zone *zone) +{ + int zid; + + for (zid = 0; zid < MAX_NR_ZONES; zid++) { + struct zone *compare = &pgdat->node_zones[zid]; + + if (populated_zone(compare)) + return zone == compare; + } + + /* The zone must be somewhere! */ + WARN_ON_ONCE(1); + return false; +} + static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat, struct zone *zone) { int i; seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name); + if (is_zone_first_populated(pgdat, zone)) { + seq_printf(m, "\n per-node stats"); + for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) { + seq_printf(m, "\n %-12s %lu", + vmstat_text[i + NR_VM_ZONE_STAT_ITEMS], + node_page_state(pgdat, i)); + } + } seq_printf(m, "\n pages free %lu" "\n min %lu" -- 2.6.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org