linux-kernel - Re: [ofa-general] InfiniBand/iWARP/RDMA merge plans for 2.6.26 (what's in infiniband.git)

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Date:	Wed, 02 Apr 2008 09:19:17 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	tziporet@....mellanox.co.il
Cc:	general@...ts.openfabrics.org, linux-kernel@...r.kernel.org
Subject: Re: [ofa-general] InfiniBand/iWARP/RDMA merge plans for 2.6.26 (what's in infiniband.git)

 > We want to add send with invalidate & mask compare and swap.
 > Eli will be able to send the patches next week and since they are
 > small I think they can be in for 2.6.26

Send with invalidate should be OK.  Let's see about the masked atomics
stuff -- we have a ton of new verbs and I think we might want to slow
down and make sure it all makes sense.

 > What about the split CQ for UD mode? It's improved the IPoIB
 > performance for small messages significantly.

Oh yeah... I'll try to get that in too.

 > mlx4- we plan to send patches for the low level driver only to enable
 > mlx4_en. These only affect our low level driver.

No problem in principle, let's see the actual patches.

 > I think we should try to push for XEC in 2.6.26 since there are
 > already MPI implementation that use it and this ties them to use OFED
 > only.
 > Also this feature is stable and now being defined in IBTA
 > Not taking it causing changes between OFED and the kernel and your
 > libibverbs and we wish to avoid such gaps.
 > Is there any thing we can do to help and make it into 2.6.26?

I don't have a good feeling that the user-kernel interface is well
thought out, so I want to consider XRC + ehca LL stuff + new iWARP verbs
and make sure we have something that makes sense for the future.

 - R.
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