NVME_SMALL_POOL_SIZE
NVME_SMALL_POOL_SIZE / sizeof(__le64))
if (entries <= NVME_SMALL_POOL_SIZE / sizeof(*sg_list))
((NVME_SMALL_POOL_SIZE / sizeof(struct nvme_sgl_desc)) - 1)
size_t small_align = NVME_SMALL_POOL_SIZE;
NVME_SMALL_POOL_SIZE, small_align, 0, numa_node);