[ofa-general] [NFS/RDMA] Can't mount NFS/RDMA partition

[Talpey, Thomas]

At 10:01 AM 12/17/2008, Talpey, Thomas wrote:
>At 07:56 AM 12/17/2008, Celine Bourde wrote:
>>Hi,
>>
>>I can't mount an NFS/RDMA partition. 
>>
>>I've applied
>>http://www.openfabrics.org//downloads/OFED/ofed-1.4/OFED-1.4-docs/nfs-
>>rdma.release-notes.txt
>>instructions.
>
>Do you really need to run OFED? Since 2.6.24, stock kernel.org supports
>the NFS/RDMA client, and since 2.6.25 the server is as well. Fedora 9 and
>Fedora 10 both support NFS/RDMA and IB, for example.

Wait a sec - you are running 2.6.27! You should not install OFED, everything
you need is already in the kernel.



>>My configuration is :
>>kernel : 2.6.27 with NFS options
>>last stable OFED 1.4

So my suggestion is, just run the stock kernel. Please post your
results - it should work fine. There are some improvements to NFS/RDMA
coming in 2.6.28, btw, especially if you want to run over iWARP
since the "frmr" memory registration will be supported. These are
all present in 2.6.28-rc1 thrugh current -rc8.
Tom.

>
>>
>>Every steps (loading modules, /etc/exports implementation, starting 
>nfs daemon,
>>etc..) seems to be ok, but when I do the last command :
>>mount -o rdma,port=2050 192.168.0.13:/export /tmp/nfs_client/
>>the mount processus blocks even last dmesg output seems correct  :
>>"RPC: Registered rdma transport module.
>>rpcrdma: connection to 192.168.0.13:2050 on mlx4_0, memreg 5 slots 32 ird 16
>>"
>
>This is all great - the connection was made, and the initial NFS exchanges were
>performed. Did you try any NFS operations at this point?
>
>>If I try "ibstat" after that, I have a kernel panic message :
>>"ibpanic: [4826] main: stat of IB device 'mlx4_0' failed: (Device or resource
>>busy)" because device is in use.
>
>I can't explain this - certainly I've never seen it. I am going to 
>guess it's an
>OFED issue, or something in your setup. Do you have any other detail? Stack
>trace of the oops?
>
>Tom.
>
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