From: Peng Zhang Date: Sun, 29 Jan 2023 09:00:33 +0000 (+0800) Subject: memblock: Make a boundary tighter in memblock_add_range(). X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ad500fb2d11b3739dcbc17a31976828b9161ecf5;p=linux.git memblock: Make a boundary tighter in memblock_add_range(). When type->cnt * 2 + 1 is less than or equal to type->max, there is enough empty regions to insert. Signed-off-by: Peng Zhang Link: https://lore.kernel.org/r/20230129090034.12310-2-zhangpeng.00@bytedance.com Signed-off-by: Mike Rapoport (IBM) --- diff --git a/mm/memblock.c b/mm/memblock.c index 685e30e6d27c5..836eb71ea3eab 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -601,11 +601,11 @@ static int __init_memblock memblock_add_range(struct memblock_type *type, /* * The worst case is when new range overlaps all existing regions, * then we'll need type->cnt + 1 empty regions in @type. So if - * type->cnt * 2 + 1 is less than type->max, we know + * type->cnt * 2 + 1 is less than or equal to type->max, we know * that there is enough empty regions in @type, and we can insert * regions directly. */ - if (type->cnt * 2 + 1 < type->max) + if (type->cnt * 2 + 1 <= type->max) insert = true; repeat: