linux-kernel - Re: [PATCH v5 22/27] IB/Verbs: Use management helper cap

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Message-ID: <5538A4E2.5020900@profitbricks.com>
Date:	Thu, 23 Apr 2015 09:53:06 +0200
From:	Michael Wang <yun.wang@...fitbricks.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
CC:	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org, hal@....mellanox.co.il,
	Tom Tucker <tom@...ngridcomputing.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Mike Marciniszyn <infinipath@...el.com>,
	Eli Cohen <eli@...lanox.com>,
	Faisal Latif <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Ira Weiny <ira.weiny@...el.com>, Tom Talpey <tom@...pey.com>,
	Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH v5 22/27] IB/Verbs: Use management helper cap_ipoib()



On 04/22/2015 07:24 PM, Jason Gunthorpe wrote:
> On Wed, Apr 22, 2015 at 10:49:44AM +0200, Michael Wang wrote:
>>
>> On 04/22/2015 07:40 AM, Jason Gunthorpe wrote:
>>> On Mon, Apr 20, 2015 at 10:41:38AM +0200, Michael Wang wrote:
>>>  
>>>> Introduce helper cap_ipoib() to help us check if the port of an
>>>> IB device support IP over Infiniband.
>>>
>>> I thought we were dropping this in favor of listing the actual
>>> features the ULP required unconditionally? One of my messages had the
>>> start of a list..
>>
>> Shall we drop it now or wait until the mechanism introduced?
>>
>> Just wondering the requirement of ULP could be similar to the
>> requirement of management, isn't it? if the device can tell
>> which ULP it support, then may be a cap_XX() make sense in here?
> 
> You have to audit the ipoib dirver and see what core functions it
> calls that have cap requirements themselves.
> 
> At least SA, multicast and CM. It also requires cap_ib_ah() or
> whatever we called that.

I get your point :-) I'd like to suggest we put these in different threads:

1. bitmask reform
2. ulp check mechanism
3. naming (i think it'll be a really big discussion :-P)

Separate them can help us focus on a particular topic at once, and the
purpose of patches will be more clear ;-)

Regards,
Michael Wang

> 
> JAson
> 
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