linux-kernel - Re: [PATCH RFC] Documentation/infiniband: Add docs for rdma-helpers

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Date:	Fri, 15 May 2015 17:02:57 +0200
From:	Michael Wang <yun.wang@...fitbricks.com>
To:	Doug Ledford <dledford@...hat.com>
CC:	"Hefty, Sean" <sean.hefty@...el.com>,
	Roland Dreier <roland@...nel.org>,
	Hal Rosenstock <hal@....mellanox.co.il>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	"Weiny, Ira" <ira.weiny@...el.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Subject: Re: [PATCH RFC] Documentation/infiniband: Add docs for rdma-helpers



On 05/15/2015 04:40 PM, Doug Ledford wrote:
[snip]
> 
> The test itself doesn't mean that.  It means we need a RoCE address
> (it's true when transport is IB and link layer is Ethernet).  That we
> *use* it during connectionless communication because we have to generate
> our own address vector for the packet while during connected queue pair
> use the address vector is created by the card using the queue pair
> information is just the circumstance of its use.  And even though a
> disconnected queue pair isn't solidly connected to a remote endpoint, it
> is solidly bound to an adapter that requires either an IB or Ethernet
> address family.  Maybe this to resolve your issue with the wording:

Thanks for the explain :-) The term 'connectionless' still sounds a little
strange to me when it's just means no HW support on creating address vector,
but I can understand the concept.

> 
> This helper is true when the address family of this queue pair is of the
> Ethernet (RoCE) variety.

Sounds good, will be merged in next version :-)

Regards,
Michael Wang

> 
> 
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