How to change default memlock limit in gnome/desktop

Issue

• I want to run an application that communicates via Infiniband. It is aborting with an MPI_Init: ibv_create_cq() failed 4, Can't initialize RDMA device error due to a memlock limit to low.

• Even if I increase the limit in /etc/security/limits.d/rdma.conf, the change does not reflect when executing ulimit in gnome-shell or konsole:

  $ cat  /etc/security/limits.d/rdma.conf
  # configuration for rdma tuning
  @rdma       soft    memlock    unlimited
  @rdma       hard    memlock    unlimited
  #rdma tuning end
  
  $ ulimit | grep locked
  max locked memory       (kbytes, -l) 64