Re: [Qemu-devel] [RFC PATCH RDMA support v2: 4/6] initialize RDMA options when QEMU first runs on command-line

[Paolo Bonzini]

Il 19/02/2013 07:00, Michael R. Hines ha scritto:
> Yes, this is done at migration time (see functions "rdma_client_init"
> and "rdma_server_prepare()")
> 
> To explain the host and port:
> 
> The separate host and port are used by the library "librdmacm". This
> library performs a network translation between the IP address and a
> unique infiniband user-level Port number and the physical interface that
> has the RDMA capabilities. This library requires an IP address and port
> bound specifically to the requested RDMA interface to work.
> 
> The patch does not assume that the network interface used for TCP
> traffic will necessarily be the same as the interface used for RDMA
> traffic.

Of course the best thing to do would be to have all traffic on the RDMA
interface... :)

Paolo

> Alternatively, this host and port could be specified using the QMP
> "migrate" command, but this command already has the URI for the TCP side
> of things reserved.
> 
> If you guys like, we could specify a *second* URI on the QMP command
> line - we don't really have a preference.
> 
> Either way is fine........ whatever the consensus is.
> 
> - Michael