[ewg] [PATCH] [for-2.6.33] rdma/cm: disallow loopback address for iwarp devices

[Steve Wise]

Sean Hefty wrote:
>> IMO 127.0.0.1 should be for SW loopback, not HW RDMA loopback.
>>     
>
> I disagree, but what does it matter?  So, we add a 'software' loopback that uses
> 127.0.0.1.  Openmpi still wouldn't work.
>
>   

I guess that's true.

>> I will commit to get the fix in openmpi asap.
>>     
>
> If we don't care if the fix is in the kernel or user space, then we could add an
> a 'disable-loopback-support' build option to librdmacm, which can fail any
> attempt to bind to a loopback address.
>
>   

I'd rather see it removed from 2.6.33 kernel before it shipts, and then 
we fix openmpi, and then re-submit 127.0.0.1 support once openmpi 
publishes a release with its fix.  See my other email that submits a 
potential commit to remove 127.0.0.1 support for 2.6.33. 

Steve.