linux-kernel - [PATCH] memblock: Update nid info in memblock debugfs

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Message-Id: <20230529062002.157-1-ssawgyw@gmail.com>
Date:   Mon, 29 May 2023 14:20:02 +0800
From:   Yuwei Guan <ssawgyw@...il.com>
To:     rppt@...nel.org, akpm@...ux-foundation.org,
        wangkefeng.wang@...wei.com, anshuman.khandual@....com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Yuwei Guan <ssawgyw@...il.com>
Subject: [PATCH] memblock: Update nid info in memblock debugfs

The node id for memblock reserved regions will be wrong,
so let's show 'x' for reg->nid == MAX_NUMNODES in debugfs to keep it align.

Suggested-by: Mike Rapoport (IBM) <rppt@...nel.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
Signed-off-by: Yuwei Guan <ssawgyw@...il.com>
---
 mm/memblock.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index c5c80d9bcea3..3d449aaba052 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -2169,17 +2169,21 @@ static int memblock_debug_show(struct seq_file *m, void *private)
 {
 	struct memblock_type *type = m->private;
 	struct memblock_region *reg;
-	int i, j;
+	int i, j, nid;
 	unsigned int count = ARRAY_SIZE(flagname);
 	phys_addr_t end;
 
 	for (i = 0; i < type->cnt; i++) {
 		reg = &type->regions[i];
 		end = reg->base + reg->size - 1;
+		nid = memblock_get_region_node(reg);
 
 		seq_printf(m, "%4d: ", i);
 		seq_printf(m, "%pa..%pa ", &reg->base, &end);
-		seq_printf(m, "%4d ", memblock_get_region_node(reg));
+		if (nid != MAX_NUMNODES)
+			seq_printf(m, "%4d ", nid);
+		else
+			seq_printf(m, "%4c ", 'x');
 		if (reg->flags) {
 			for (j = 0; j < count; j++) {
 				if (reg->flags & (1U << j)) {
-- 
2.34.1