netdev - Re: [PATCH v2 iproute2-next 0/6] cm_id, cq, mr, and pd resource tracking

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Date:   Thu, 22 Mar 2018 15:20:23 -0500
From:   Steve Wise <swise@...ngridcomputing.com>
To:     David Ahern <dsahern@...il.com>,
        Doug Ledford <dledford@...hat.com>,
        Leon Romanovsky <leon@...nel.org>, stephen@...workplumber.org
Cc:     netdev@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [PATCH v2 iproute2-next 0/6] cm_id, cq, mr, and pd resource
 tracking



On 3/21/2018 11:59 AM, David Ahern wrote:
> On 3/20/18 11:21 AM, Doug Ledford wrote:
>> On 3/16/2018 12:18 PM, David Ahern wrote:
>>> On 3/13/18 1:58 PM, Doug Ledford wrote:
>>>> On Tue, 2018-03-13 at 13:45 -0700, David Ahern wrote:
>>>>> On 3/13/18 1:32 AM, Leon Romanovsky wrote:
>>>>>> On Mon, Mar 12, 2018 at 10:53:03AM -0700, David Ahern wrote:
>>>>>>> On 3/12/18 8:16 AM, Steve Wise wrote:
>>>>>>>> Hey all,
>>>>>>>>
>>>>>>>> The kernel side of this series has been merged for rdma-next [1].  Let me
>>>>>>>> know if this iproute2 series can be merged, of if it needs more changes.
>>>>>>>>
>>>>>>> The problem is that iproute2 headers are synced to kernel headers from
>>>>>>> DaveM's tree (net-next mainly). I take it this series will not appear in
>>>>>>> Dave's tree until after a merge through Linus' tree. Correct?
>>>>>> David,
>>>>>>
>>>>>> Technically, you are right, and we would like to ask you for an extra tweak
>>>>>> to the flow for the RDMAtool, because current scheme causes delays at least
>>>>>> cycle.
>>>>>>
>>>>>> Every RDMAtool's patchset which requires changes to headers is always
>>>>>> includes header patch, can you please accept those series and once you
>>>>>> are bringing new net-next headers from Linus, simply overwrite all our
>>>>>> headers?
>>>>> I did not follow the discussion back when this decision was made, so how
>>>>> did rdma tool end up in iproute2?
>>>> It is modeled after the ip command, and for better or worse, the
>>>> iproute2 package has become the standard drop box for low level kernel
>>>> network configuring tools.  The RDMA subsystem may not be IP networking,
>>>> but it is still networking, so it seemed an appropriate fit.
>>> why doesn't the rdma tree go through Dave then?
>>>
>> Because it doesn't use the core network stack hardly at all.  It creates
>> netdevs when it needs to bridge the two stacks, but otherwise the RDMA
>> subsystem core is apart and unique from the network stack Dave manages.
>> When I said it was networking, I meant it literally.  The RDMA fabrics
>> are networks.  It wasn't meant to imply that they shared anything
>> substantial in common with the typical Ethernet/IP networking that is
>> the core of what Dave manages.
>>
> I think the simplest approach is to move the uapi header under the rdma
> directory and you folks take ownership of that header.

Fine with me.  Leon?  

Steve.