linux-kernel - Re: [PATCH for-next 0/2] RDMA/hns: Support configuring congestion control algorithm with QP granularity

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Date: Mon, 19 Feb 2024 10:28:52 +0800
From: Junxian Huang <huangjunxian6@...ilicon.com>
To: Leon Romanovsky <leon@...nel.org>
CC: <jgg@...pe.ca>, <linux-rdma@...r.kernel.org>, <linuxarm@...wei.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH for-next 0/2] RDMA/hns: Support configuring congestion
 control algorithm with QP granularity



On 2024/2/8 16:10, Leon Romanovsky wrote:
> On Wed, Feb 07, 2024 at 04:59:56PM +0800, Junxian Huang wrote:
>>
>>
>> On 2024/2/7 16:33, Leon Romanovsky wrote:
>>> On Wed, Feb 07, 2024 at 11:29:08AM +0800, Junxian Huang wrote:
>>>> Patch #1 reverts a previous bugfix that was intended to add restriction
>>>> to congestion control algorithm for UD but mistakenly introduced other
>>>> problem.
>>>
>>> First patch shouldn't be revert but a fix to "add a restriction that only DCQCN
>>> is supported for UD." and second patch should be a new feature.
>>>
>>> Thanks
>>>
>>
>> OK, but I have two questions here:
>>
>> 1. Of course we can not only revert but also completely fix the bug in patch #1.
>>    But since we are adding a new feature that can also fix this bug in patch #2,
>>    the fix in patch #1 will be immediately removed in patch #2. Is this acceptable?
> 
> I would expect that second patch will extend the first one and not remove.
> 
>>
>> 2. Should I still put these two patches into one patchset in the next version, or
>>    seperate them into two individual patchset?
> 
> Better to separate, as we will take fix faster than new feature.
> 
> Thanks
> 

Sorry for the late reply. Will separate and re-send the fix first. Please ignore the v2
of this series.

Thanks,
Junxian

>>
>> Thanks,
>> Junxian
>>
>>>>
>>>> Patch #2 adds support for configuring congestion control algorithm with
>>>> QP granularity. The algorithm restriction for UD is added in this patch.
>>>>
>>>> Junxian Huang (1):
>>>>   RDMA/hns: Support configuring congestion control algorithm with QP
>>>>     granularity
>>>>
>>>> Luoyouming (1):
>>>>   Revert "RDMA/hns: The UD mode can only be configured with DCQCN"
>>>>
>>>>  drivers/infiniband/hw/hns/hns_roce_device.h | 26 +++++---
>>>>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c  | 18 ++----
>>>>  drivers/infiniband/hw/hns/hns_roce_hw_v2.h  |  3 +-
>>>>  drivers/infiniband/hw/hns/hns_roce_main.c   |  3 +
>>>>  drivers/infiniband/hw/hns/hns_roce_qp.c     | 71 +++++++++++++++++++++
>>>>  include/uapi/rdma/hns-abi.h                 | 17 +++++
>>>>  6 files changed, 118 insertions(+), 20 deletions(-)
>>>>
>>>> --
>>>> 2.30.0
>>>>
>>>