Re: [for-next 1/2] xprtrdma: take reference of rdma provider module

[Shirley Ma <shirley.ma-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>]

On 07/18/2014 06:27 AM, Steve Wise wrote:
>>>> We can't really deal with a CM_DEVICE_REMOVE event while there are
>>>> active NFS mounts.
>>>>
>>>> System shutdown ordering should guarantee (one would hope) that NFS
>>>> mount points are unmounted before the RDMA/IB core infrastructure is
>>>> torn down. Ordering shouldn't matter as long all NFS activity has
>>>> ceased before the CM tries to remove the device.
>>>>
>>>> So if something is hanging up the CM, there's something xprtrdma is
>>>> not cleaning up properly.
>>>>
>>>
>>>
>>> Devesh, how are you reproducing this?  Are you just rmmod'ing the ocrdma
>>> module while there are active mounts?
>>
>> Yes, I am issuing rmmod while there is an active mount. In my case rmmod ocrdma remains
>> blocked forever.
Where is it blocked?

>> Off-the-course of this discussion: Is there a reasoning behind not using
>> ib_register_client()/ib_unregister_client() framework?
> 
> I think the idea is that you don't need to use it if you are transport-independent and use
> the rdmacm...
> 
> 
> 
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