[openib-general] [PATCH] librdmacm: fix bug causing failure to work with partial membership pkey

[Hal Rosenstock]

On Tue, 2007-02-20 at 10:38, Or Gerlitz wrote:
> Hal Rosenstock wrote:
> 
> >> The pkey extracted by the RDMA CM from the IPoIB device hardware address always
> >> has the full membership bit set. However, when looking in the pkey table the
> >> search must mask out the full membership bit.
> 
> > Is this true for both RC and UD QPs ? I thought that at least the UD QPs
> > were being used for multicast in which case  wouldn't full member be
> > required for this ?
> 
> Yes. Its a little bit confusing: partial and full members of an IPoIB IB 
> partition use the same MGID. When an IPoIB MGID is constructed, the pkey 
> placed by the driver is --always-- the full membership one. However, on 
> a node with partial membership, what's plugged into the QP is the pkey 
> index of the partial instance...

So in this case, do both the full and partial keys need configuring for
that port ?

-- Hal

> In the kernel all this is nicely hidden from the IB ULPs in 
> ib_find_cached_pkey().
> 
> Or.
>