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From:   Daniel Jordan <daniel.m.jordan@oracle.com>
To:     Andrew Morton <akpm@linux-foundation.org>,
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        Daniel Jordan <daniel.m.jordan@oracle.com>
Subject: [PATCH v3 5/8] mm: don't track number of pages during deferred initialization
Date:   Wed, 27 May 2020 13:36:05 -0400
Message-Id: <20200527173608.2885243-6-daniel.m.jordan@oracle.com>
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Deferred page init used to report the number of pages initialized:

  node 0 initialised, 32439114 pages in 97ms

Tracking this makes the code more complicated when using multiple
threads.  Given that the statistic probably has limited value,
especially since a zone grows on demand so that the page count can vary,
just remove it.

The boot message now looks like

  node 0 deferred pages initialised in 97ms

Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Suggested-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
---
 mm/page_alloc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d0c0d9364aa6d..d64f3027fdfa6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1819,7 +1819,7 @@ static int __init deferred_init_memmap(void *data)
 {
 	pg_data_t *pgdat = data;
 	const struct cpumask *cpumask = cpumask_of_node(pgdat->node_id);
-	unsigned long spfn = 0, epfn = 0, nr_pages = 0;
+	unsigned long spfn = 0, epfn = 0;
 	unsigned long first_init_pfn, flags;
 	unsigned long start = jiffies;
 	struct zone *zone;
@@ -1868,15 +1868,15 @@ static int __init deferred_init_memmap(void *data)
 	 * allocator.
 	 */
 	while (spfn < epfn) {
-		nr_pages += deferred_init_maxorder(&i, zone, &spfn, &epfn);
+		deferred_init_maxorder(&i, zone, &spfn, &epfn);
 		cond_resched();
 	}
 zone_empty:
 	/* Sanity check that the next zone really is unpopulated */
 	WARN_ON(++zid < MAX_NR_ZONES && populated_zone(++zone));
 
-	pr_info("node %d initialised, %lu pages in %ums\n",
-		pgdat->node_id,	nr_pages, jiffies_to_msecs(jiffies - start));
+	pr_info("node %d deferred pages initialised in %ums\n",
+		pgdat->node_id, jiffies_to_msecs(jiffies - start));
 
 	pgdat_init_report_one_done();
 	return 0;
-- 
2.26.2