From: Michal Hocko <mhocko@xxxxxxxx> 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/20220127085305.20890-6-mhocko@xxxxxxxxxx Signed-off-by: Michal Hocko <mhocko@xxxxxxxx> Acked-by: Rafael Aquini <raquini@xxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> Reviewed-by: Oscar Salvador <osalvador@xxxxxxx> Cc: Alexey Makhalov <amakhalov@xxxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Dennis Zhou <dennis@xxxxxxxxxx> Cc: Eric Dumazet <eric.dumazet@xxxxxxxxx> Cc: Nico Pache <npache@xxxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: Wei Yang <richard.weiyang@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page_alloc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) --- 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); _
