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-rw-r--r--mm/memblock.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index e4f03a6e8e56..16f006521afa 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -593,6 +593,17 @@ static int __init_memblock memblock_add_range(struct memblock_type *type,
type->total_size = size;
return 0;
}
+
+ /*
+ * 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
+ * that there is enough empty regions in @type, and we can insert
+ * regions directly.
+ */
+ if (type->cnt * 2 + 1 < type->max)
+ insert = true;
+
repeat:
/*
* The following is executed twice. Once with %false @insert and