CONFIG_X86_VSMP vSMP sets internode cache padding to 4k. Off.
This makes default CONFIG_X86_INTERNODE_CACHE_SHIFT sane(r).

CONFIG_MAXSMP sets NR_CPUS to 8k, making some structs insanely large.
Off to make CONFIG_NR_CPUS saner.
CONFIG_NODES_SHIFT is hardwired to 10 if CONFIG_MAXSMP. Need to reset
it when unsetting CONFIG_MAXSMP.

For now, set CONFIG_NR_CPUS=512 as a "reasonably big" number:
such as one-socket system wih Knights Landing CPU.


CONFIG_TEST_RHASHTABLE has a hugest static array (named "array").

00400000 b stack_trace		CONFIG_LOCKDEP
003dfe10 b lock_classes		CONFIG_LOCKDEP
00200000 B lock_chains		CONFIG_LOCKDEP
00200000 b list_entries		CONFIG_LOCKDEP
001bff20 V cpu_lock_stats	CONFIG_LOCKDEP && CONFIG_LOCK_STAT
000a0000 b chain_hlocks		CONFIG_LOCKDEP
00080000 b chainhash_table	CONFIG_LOCKDEP
00010000 b classhash_table	CONFIG_LOCKDEP
CONFIG_LOCKDEP is selected by any of:
    DEBUG_WW_MUTEX_SLOWPATH
    CONFIG_DEBUG_LOCK_ALLOC
    CONFIG_PROVE_LOCKING
    CONFIG_LOCK_STAT

00140000 b obj_hash		CONFIG_DEBUG_OBJECTS
00020000 b entries		CONFIG_TIMER_STATS

00040000 b debug_alloc_pool_aligned  CONFIG_KGDB_KDB (kdb_support.c)

28842x00000028 d descriptor.NN	CONFIG_DYNAMIC_DEBUG