EXT4_NOJOURNAL_MAX_REF_COUNT   16 fs/ext4/ext4_jbd2.c 	BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);
EXT4_NOJOURNAL_MAX_REF_COUNT  273 fs/ext4/ext4_jbd2.h 	if ((unsigned long)handle < EXT4_NOJOURNAL_MAX_REF_COUNT)