lowmem_max 1002 arch/arm/kernel/setup.c unsigned long long lowmem_max = __pa(high_memory - 1) + 1; lowmem_max 1003 arch/arm/kernel/setup.c if (crash_max > lowmem_max) lowmem_max 1004 arch/arm/kernel/setup.c crash_max = lowmem_max;