6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx> commit 9cdc6423acb49055efb444ecd895d853a70ef931 upstream. Currently memblock validate_numa_converage() returns false negative when threshold set to zero. Make the check if the memory size with invalid node ID is greater than the threshold exclusive to fix that. Link: https://lore.kernel.org/all/Z0mIDBD4KLyxyOCm@xxxxxxxxxx/ Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- mm/memblock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/memblock.c +++ b/mm/memblock.c @@ -735,7 +735,7 @@ int __init_memblock memblock_add(phys_ad /** * memblock_validate_numa_coverage - check if amount of memory with * no node ID assigned is less than a threshold - * @threshold_bytes: maximal number of pages that can have unassigned node + * @threshold_bytes: maximal memory size that can have unassigned node * ID (in bytes). * * A buggy firmware may report memory that does not belong to any node. @@ -755,7 +755,7 @@ bool __init_memblock memblock_validate_n nr_pages += end_pfn - start_pfn; } - if ((nr_pages << PAGE_SHIFT) >= threshold_bytes) { + if ((nr_pages << PAGE_SHIFT) > threshold_bytes) { mem_size_mb = memblock_phys_mem_size() >> 20; pr_err("NUMA: no nodes coverage for %luMB of %luMB RAM\n", (nr_pages << PAGE_SHIFT) >> 20, mem_size_mb);
