min_unit_size    2538 mm/percpu.c    	size_t size_sum, min_unit_size, alloc_size;
min_unit_size    2560 mm/percpu.c    	min_unit_size = max_t(size_t, size_sum, PCPU_MIN_UNIT_SIZE);
min_unit_size    2563 mm/percpu.c    	alloc_size = roundup(min_unit_size, atom_size);
min_unit_size    2564 mm/percpu.c    	upa = alloc_size / min_unit_size;