[openib-general] Performance Degradation with OFED v. Voltaire(lustre)

[Or Gerlitz]

Bernadat, Philippe wrote:
> 3) Is there a way to change the MTU from within the lustre LND kernel
> module. I saw that the IB perf programs did this with the modify_qp()
> APIs.

yes, go to the place where the lustre NLD active side gets 
RDMA_CM_EVENT_ROUTE_RESOLVED event on its rdma cm id and then set

	lustre_id->route->path_rec->mtu = IB_MTU_1024;

Or.