support for pool with 0 start size

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>
Extending XIO_MAX_IOV from 16 to 256

Also needed to remove temporary variables that became large objects from stack

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>
changing the internal RDMA max slab size to 24K.
this size is reached only when system is in extreme stress.

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>
updated script

Signed-off-by: Eyal Salomon <esalomon@mellanox.com>