Re: Maximum size for memory registration (ibv_reg_mr)

Roland Dreier
2010-09-24T22:36:54Z

> Is there any limit on the maximum size of memory that can be registered
> using ibv_reg_mr. I am using OFED-1.4.2 stack, and when I try to pass a size
> greater than 16GB ibv_reg_mr returns NULL. The total amount of physical
> memory on the node is 48GB, max locked memory(ulimit -l) is set to
> unlimited.

The limit depends on the HCA.