Re: [PATCH 1/2] rdma/cm: support option to allow manually setting IB path

Jason Gunthorpe
2009-10-05T17:56:56Z

On Mon, Oct 05, 2009 at 10:43:44AM -0700, Sean Hefty wrote:
> Export rdma_set_ib_paths to user space to allow applications to
> manually set the IB path used for connections. This allows
> alternative ways for a user space application or library to obtain
> path record information, including retrieving path information
> from cached data, avoiding direct interaction with the IB SA.
> The IB SA is a single, centralized entity that can limit scaling
> on large clusters running MPI applications.

Um, isn't this kind of low level control exactly why we have the IB
CM?

Jason