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From: "Hefty, Sean" <sean.hefty@intel.com>
To: Doug Ledford <dledford@redhat.com>,
        Michael Wang <yun.wang@profitbricks.com>
CC: Roland Dreier <roland@kernel.org>, Hal Rosenstock <hal@dev.mellanox.co.il>,
        "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
        Or Gerlitz <ogerlitz@mellanox.com>, "Weiny, Ira" <ira.weiny@intel.com>,
        Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Subject: RE: [PATCH RFC] Documentation/infiniband: Add docs for rdma-helpers
Thread-Topic: [PATCH RFC] Documentation/infiniband: Add docs for rdma-helpers
Thread-Index: AQHQjYA3lKMtbatZbEy1E4NKVWWB7Z16eKIA//+jPQA=
Date: Wed, 13 May 2015 16:42:31 +0000
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 <1431529914.2377.22.camel@redhat.com>
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> > +  rdma_cap_ib_cm
> > +  ---------------
> > +    Communication Manager (CM) will handle the connections between
>        ^Connection Manager (CM) service, used to ease the process of

In IB terms, this is communication manager.  It also handles transport level address resolution for UD QPs.

> > +  rdma_cap_eth_ah
> > +  ---------------
> > +    Infiniband address handler format is special in ethernet fabric,
> use
> > +    the helper to verify whether the port is using ethernet format or
> not.
> 
> This helper is true when the address of the specific connection is of
> the Ethernet (RoCE) variety.

This is used for connectionless communication.
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