When memblock_reserve() fails because memblock.reserved.regions cannot be resized, the caller (e.g. alloc_bootmem()) is not informed of the failed allocation. Therefore alloc_bootmem() silently returns the same pointer again and again. This patch adds a check for the return value of memblock_reserve() in __alloc_memory_core(). Signed-off-by: Philipp Hachtmann <phacht@xxxxxxxxxxxxxxxxxx> --- mm/nobootmem.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/nobootmem.c b/mm/nobootmem.c index 2c254d3..3a7e14d 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -45,7 +45,9 @@ static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align, if (!addr) return NULL; - memblock_reserve(addr, size); + if (memblock_reserve(addr, size)) + return NULL; + ptr = phys_to_virt(addr); memset(ptr, 0, size); /* -- 1.8.4.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>