[ewg] NFSoRDMA: Can't restart NFS server

[PN]

Hi,

I'm using CentOS 5.4 with OFED-1.5-rc3 and Mellanox ConnectX cards.
I follow the steps of nfs-rdma.release-notes.txt and can use NFS over RDMA
successfully in the first time.
However, after umount the file system and restart the NFS server, it shows
the following error:

# /etc/init.d/nfs stop
Shutting down NFS mountd:                                  [  OK  ]
Shutting down NFS daemon:                                  [  OK  ]
Shutting down NFS quotas:                                  [  OK  ]
Shutting down NFS services:

# cat /proc/fs/nfsd/portlist
rdma 20049
tcp 2049
udp 2049

# lsmod |grep rdma
svcrdma                69184  1
sunrpc                245544  14 svcrdma,nfsd,nfs,nfs_acl,auth_rpcgss,lockd
rdma_ucm               47872  0
rdma_cm                69140  3 svcrdma,rdma_ucm,ib_sdp
iw_cm                  43656  1 rdma_cm
ib_addr                43016  1 rdma_cm
ib_cm                  73000  2 rdma_cm,ib_ipoib
ib_sa                  75144  3 rdma_cm,ib_ipoib,ib_cm
ib_uverbs              75696  1 rdma_ucm
ib_core               109312  15
svcrdma,rdma_ucm,ib_sdp,rdma_cm,iw_cm,ib_ipoib,ib_cm,ib_sa,ib_uverbs,ib_umad,iw_nes,iw_cxgb3,mlx4_ib,ib_mthca,ib_mad

# /etc/init.d/nfs start
Starting NFS services:                                     [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS daemon:                                       [FAILED]

In /var/log/messages, it shows:
Dec  2 17:34:30 mgmt nfsd[5106]: nfssvc: Setting version failed: errno 16
(Device or resource busy)
Dec  2 17:34:30 mgmt nfsd[5106]: nfssvc: unable to bind UPD socket: errno 98
(Address already in use)

And in the client side, I can no longer mount the server again.

Is there a correct ways to restart the NFS server after configuring
NFSoRDMA?

Thanks in advance.

PN
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