[168/227] mm: make free_area_init_node aware of memory less nodes

Commit Message

Andrew Morton March 22, 2022, 9:47 p.m. UTC

From: Michal Hocko <[e-mail]>
Subject: mm: make free_area_init_node aware of memory less nodes

free_area_init_node is also called from memory less node initialization
path (free_area_init_memoryless_node).  It doesn't really make much sense
to display the physical memory range for those nodes: Initmem setup node
XX [mem 0x0000000000000000-0x0000000000000000]

Instead be explicit that the node is memoryless: Initmem setup node XX as
memoryless

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Michal Hocko <[e-mail]>
Acked-by: Rafael Aquini <[e-mail]>
Acked-by: David Hildenbrand <[e-mail]>
Reviewed-by: Mike Rapoport <[e-mail]>
Reviewed-by: Oscar Salvador <[e-mail]>
Cc: Alexey Makhalov <[e-mail]>
Cc: Christoph Lameter <[e-mail]>
Cc: Dennis Zhou <[e-mail]>
Cc: Eric Dumazet <[e-mail]>
Cc: Nico Pache <[e-mail]>
Cc: Tejun Heo <[e-mail]>
Cc: Wei Yang <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/page_alloc.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

Patch

--- a/mm/page_alloc.c~mm-make-free_area_init_node-aware-of-memory-less-nodes
+++ a/mm/page_alloc.c
@@ -7642,9 +7642,14 @@  static void __init free_area_init_node(i
 	pgdat->node_start_pfn = start_pfn;
 	pgdat->per_cpu_nodestats = NULL;
 
-	pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid,
-		(u64)start_pfn << PAGE_SHIFT,
-		end_pfn ? ((u64)end_pfn << PAGE_SHIFT) - 1 : 0);
+	if (start_pfn != end_pfn) {
+		pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid,
+			(u64)start_pfn << PAGE_SHIFT,
+			end_pfn ? ((u64)end_pfn << PAGE_SHIFT) - 1 : 0);
+	} else {
+		pr_info("Initmem setup node %d as memoryless\n", nid);
+	}
+
 	calculate_node_totalpages(pgdat, start_pfn, end_pfn);
 
 	alloc_node_mem_map(pgdat);