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

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Date: Wed, 7 Feb 2024 16:59:56 +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 2024/2/7 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?

2. Should I still put these two patches into one patchset in the next version, or
   seperate them into two individual patchset?

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
>>
>