linux-kernel - [FIX PATCH 1/2] mm/page_alloc: Print node fallback order

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Message-ID: <20210830121603.1081-2-bharata@amd.com>
Date:   Mon, 30 Aug 2021 17:46:02 +0530
From:   Bharata B Rao <bharata@....com>
To:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
CC:     <akpm@...ux-foundation.org>, <kamezawa.hiroyu@...fujitsu.com>,
        <lee.schermerhorn@...com>, <mgorman@...e.de>,
        <Krupa.Ramakrishnan@....com>, <Sadagopan.Srinivasan@....com>,
        Bharata B Rao <bharata@....com>
Subject: [FIX PATCH 1/2] mm/page_alloc: Print node fallback order

Print information message about the allocation fallback order
for each NUMA node during boot.

No functional changes here. This makes it easier to illustrate
the problem in the node fallback list generation, which the
next patch fixes.

Signed-off-by: Bharata B Rao <bharata@....com>
---
 mm/page_alloc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index eeb3a9cb36bb..22f7ad6ec11c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6277,6 +6277,10 @@ static void build_zonelists(pg_data_t *pgdat)
 
 	build_zonelists_in_node_order(pgdat, node_order, nr_nodes);
 	build_thisnode_zonelists(pgdat);
+	pr_info("Fallback order for Node %d: ", local_node);
+	for (node = 0; node < nr_nodes; node++)
+		pr_cont("%d ", node_order[node]);
+	pr_cont("\n");
 }
 
 #ifdef CONFIG_HAVE_MEMORYLESS_NODES
-- 
2.25.1