UNW_LOG_CACHE_SIZE   51 arch/ia64/kernel/unwind.c #define UNW_CACHE_SIZE		(1 << UNW_LOG_CACHE_SIZE)
UNW_LOG_CACHE_SIZE   53 arch/ia64/kernel/unwind.c #define UNW_LOG_HASH_SIZE	(UNW_LOG_CACHE_SIZE + 1)