Message-ID: <20200501144448.GO26002@ziepe.ca>
Date:   Fri, 1 May 2020 11:44:48 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Maor Gottlieb <maorg@...lanox.com>
Cc:     davem@...emloft.net, dledford@...hat.com, j.vosburgh@...il.com,
        vfalico@...il.com, andy@...yhouse.net, kuba@...nel.org,
        jiri@...lanox.com, dsahern@...nel.org, leonro@...lanox.com,
        saeedm@...lanox.com, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org, alexr@...lanox.com
Subject: Re: [PATCH V8 mlx5-next 00/16] Add support to get xmit slave

On Thu, Apr 30, 2020 at 10:21:30PM +0300, Maor Gottlieb wrote:
> Hi Dave,
> 
> This series is a combination of netdev and RDMA, so in order to avoid
> conflicts, we would like to ask you to route this series through
> mlx5-next shared branch. It is based on v5.7-rc2 tag.
> 
> 
> The following series adds support to get the LAG master xmit slave by
> introducing new .ndo - ndo_get_xmit_slave. Every LAG module can
> implement it and it first implemented in the bond driver. 
> This is follow-up to the RFC discussion [1].
> 
> The main motivation for doing this is for drivers that offload part
> of the LAG functionality. For example, Mellanox Connect-X hardware
> implements RoCE LAG which selects the TX affinity when the resources
> are created and port is remapped when it goes down.
> 
> The first part of this patchset introduces the new .ndo and add the
> support to the bonding module.
> 
> The second part adds support to get the RoCE LAG xmit slave by building
> skb of the RoCE packet based on the AH attributes and call to the new
> .ndo.
> 
> The third part change the mlx5 driver driver to set the QP's affinity
> port according to the slave which found by the .ndo.
> 
> Thanks
> 
> [1]
> https://lore.kernel.org/netdev/20200126132126.9981-1-maorg@xxxxxxxxxxxx/

where did these xxxxx's come from?

> Change log:
> v8: Fix bad numbering of v7. 
> v7: Change only in RDMA part:
> 	- return slave and as output
> 	- Don't hold lock while allocating skb.
>     In addition, reorder patches, so mlx5 patches are before RDMA.
> v6: patch 1 - Fix commit message and add function description. 
>     patch 10 - Keep udata as function argument.
> v5: patch 1 - Remove rcu lock.
>     patch 10 - Refactor patch that group the AH attributes in struct.
>     patch 11 - call the ndo while holding the rcu and initialize xmit_slave.
>     patch 12 - Store the xmit slave in rdma_ah_init_attr and qp_attr.
> 
> v4: 1. Rename master_get_xmit_slave to netdev_get_xmit_slave and move
> the implementation to dev.c 
>     2. Remove unnecessary check of NULL pointer.
>     3. Fix typo.
> v3: 1. Move master_get_xmit_slave to netdevice.h and change the flags
> arg.
> to bool.
>     2. Split helper functions commit to multiple commits for each bond
> mode.
>     3. Extract refcotring changes to seperate commits.
> v2: The first patch wasn't sent in v1.
> v1:
> https://lore.kernel.org/netdev/ac373456-b838-29cf-645f-b1ea1a93e3b0@xxxxxxxxx/T/#t 
> 
> Maor Gottlieb (16):
>   net/core: Introduce netdev_get_xmit_slave
>   bonding: Export skip slave logic to function
>   bonding: Rename slave_arr to usable_slaves
>   bonding/alb: Add helper functions to get the xmit slave
>   bonding: Add helper function to get the xmit slave based on hash
>   bonding: Add helper function to get the xmit slave in rr mode
>   bonding: Add function to get the xmit slave in active-backup mode
>   bonding: Add array of all slaves
>   bonding: Implement ndo_get_xmit_slave
>   net/mlx5: Change lag mutex lock to spin lock
>   net/mlx5: Add support to get lag physical port
>   RDMA: Group create AH arguments in struct
>   RDMA/core: Add LAG functionality
>   RDMA/core: Get xmit slave for LAG
>   RDMA/mlx5: Refactor affinity related code
>   RDMA/mlx5: Set lag tx affinity according to slave

It seems fine to me too, Saeed, can you apply the net parts to the
mlx5 shared branch with DaveM's ack? Thanks

Jason

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