lowmem_kbytes 7848 mm/page_alloc.c unsigned long lowmem_kbytes; lowmem_kbytes 7851 mm/page_alloc.c lowmem_kbytes = nr_free_buffer_pages() * (PAGE_SIZE >> 10); lowmem_kbytes 7852 mm/page_alloc.c new_min_free_kbytes = int_sqrt(lowmem_kbytes * 16);