INNODB_BUFFER_POOL_LOAD_PAGES_ABORT, INNODB_LRU_FLUSH_SIZE variables are not documented

MariaDB [(none)]> select * from information_schema.system_variables where variable_name = 'INNODB_BUFFER_POOL_LOAD_PAGES_ABORT' \G

*************************** 1. row ***************************

        VARIABLE_NAME: INNODB_BUFFER_POOL_LOAD_PAGES_ABORT

        SESSION_VALUE: NULL

         GLOBAL_VALUE: 9223372036854775807

  GLOBAL_VALUE_ORIGIN: COMPILE-TIME

        DEFAULT_VALUE: 9223372036854775807

       VARIABLE_SCOPE: GLOBAL

        VARIABLE_TYPE: BIGINT UNSIGNED

     VARIABLE_COMMENT: Number of pages during a buffer pool load to process before signaling innodb_buffer_pool_load_abort=1

    NUMERIC_MIN_VALUE: 1

    NUMERIC_MAX_VALUE: 9223372036854775807

   NUMERIC_BLOCK_SIZE: 0

      ENUM_VALUE_LIST: NULL

            READ_ONLY: NO

COMMAND_LINE_ARGUMENT: REQUIRED

    GLOBAL_VALUE_PATH: NULL

1 row in set (0.003 sec)

MariaDB [(none)]> select * from information_schema.system_variables where variable_name = 'INNODB_LRU_FLUSH_SIZE' \G

*************************** 1. row ***************************

        VARIABLE_NAME: INNODB_LRU_FLUSH_SIZE

        SESSION_VALUE: NULL

         GLOBAL_VALUE: 32

  GLOBAL_VALUE_ORIGIN: COMPILE-TIME

        DEFAULT_VALUE: 32

       VARIABLE_SCOPE: GLOBAL

        VARIABLE_TYPE: BIGINT UNSIGNED

     VARIABLE_COMMENT: How many pages to flush on LRU eviction

    NUMERIC_MIN_VALUE: 1

    NUMERIC_MAX_VALUE: 18446744073709551615

   NUMERIC_BLOCK_SIZE: 0

      ENUM_VALUE_LIST: NULL

            READ_ONLY: NO

COMMAND_LINE_ARGUMENT: REQUIRED

    GLOBAL_VALUE_PATH: NULL

1 row in set (0.003 sec)