Bug#24751 - Possible infinit loop in init_io_cache() when insufficient memory - When cache memory can't be allocated size is recaclulated using 3/4 of   the requested memory. This number is rounded up to the nearest    min_cache step.    However with the previous implementation the new cache size might   become bigger than requested because of this rounding and thus we get   an infinit loop. - This patch fixes this problem by ensuring that the new cache size   always will be smaller on the second and subsequent iterations until   we reach min_cache.
Bug#24751 - Possible infinit loop in init_io_cache() when insufficient memory
- When cache memory can't be allocated size is recaclulated using 3/4 of
  the requested memory. This number is rounded up to the nearest 
  min_cache step. 
  However with the previous implementation the new cache size might
  become bigger than requested because of this rounding and thus we get
  an infinit loop.
- This patch fixes this problem by ensuring that the new cache size
  always will be smaller on the second and subsequent iterations until
  we reach min_cache.

davidl-zend/zenddbi,davidl-zend/zenddbi,flynn1973/mariadb-aix,slanterns/server,flynn1973/mariadb-aix,ollie314/server,flynn1973/mariadb-aix,ollie314/server,ollie314/server,davidl-zend/zenddbi,davidl-zend/zenddbi,davidl-zend/zenddbi,natsys/mariadb_10.2,natsys/mariadb_10.2,ollie314/server,flynn1973/mariadb-aix,davidl-zend/zenddbi,natsys/mariadb_10.2,ollie314/server,natsys/mariadb_10.2,ollie314/server,ollie314/server,davidl-zend/zenddbi,ollie314/server,flynn1973/mariadb-aix,ollie314/server,natsys/mariadb_10.2,flynn1973/mariadb-aix,natsys/mariadb_10.2,davidl-zend/zenddbi,davidl-zend/zenddbi,natsys/mariadb_10.2,natsys/mariadb_10.2,ollie314/server,natsys/mariadb_10.2,natsys/mariadb_10.2,ollie314/server,flynn1973/mariadb-aix,flynn1973/mariadb-aix,flynn1973/mariadb-aix,davidl-zend/zenddbi,flynn1973/mariadb-aix,flynn1973/mariadb-aix,natsys/mariadb_10.2,davidl-zend/zenddbi