From: Konstantin Ananyev <konstantin.ananyev@huawei.com>
To: zhoumin <zhoumin@loongson.cn>,
Thomas Monjalon <thomas@monjalon.net>,
Ruifeng Wang <Ruifeng.Wang@arm.com>,
"Zhang, Qi Z" <qi.z.zhang@intel.com>
Cc: dev <dev@dpdk.org>, mb <mb@smartsharesystems.com>,
konstantin.v.ananyev <konstantin.v.ananyev@yandex.ru>,
"Yang, Qiming" <qiming.yang@intel.com>,
"Wu, Wenjun1" <wenjun1.wu@intel.com>,
drc <drc@linux.vnet.ibm.com>,
roretzla <roretzla@linux.microsoft.com>, stable <stable@dpdk.org>,
maobibo <maobibo@loongson.cn>, nd <nd@arm.com>,
David Marchand <david.marchand@redhat.com>,
honnappa.nagarahalli <honnappa.nagarahalli@arm.com>,
Tyler Retzlaff <roretzla@microsoft.com>
Subject: RE: [PATCH v3] net/ixgbe: add proper memory barriers for some Rx functions
Date: Wed, 14 Jun 2023 10:58:33 +0000 [thread overview]
Message-ID: <7E8138E8-8925-42E7-A98B-B1C89DFD7CAB> (raw)
In-Reply-To: <63d8f649-b718-a2f8-52b5-270747157413@loongson.cn>
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________________________________
Konstantin Ananyev
Mobile: +353-873459988
Email: konstantin.ananyev@huawei.com
From:zhoumin <zhoumin@loongson.cn>
To:Thomas Monjalon <thomas@monjalon.net>;Ruifeng Wang <Ruifeng.Wang@arm.com>;Zhang, Qi Z <qi.z.zhang@intel.com>
Cc:dev <dev@dpdk.org>;mb <mb@smartsharesystems.com>;konstantin.v.ananyev <konstantin.v.ananyev@yandex.ru>;Yang, Qiming <qiming.yang@intel.com>;Wu, Wenjun1 <wenjun1.wu@intel.com>;drc <drc@linux.vnet.ibm.com>;roretzla <roretzla@linux.microsoft.com>;stable <stable@dpdk.org>;maobibo <maobibo@loongson.cn>;nd <nd@arm.com>;David Marchand <david.marchand@redhat.com>;honnappa.nagarahalli <honnappa.nagarahalli@arm.com>;Tyler Retzlaff <roretzla@microsoft.com>;Konstantin Ananyev <konstantin.ananyev@huawei.com>
Date:2023-06-13 04:43:12
Subject:Re: [PATCH v3] net/ixgbe: add proper memory barriers for some Rx functions
Hi Thomas,
On Mon, June 12, 2023 at 8:44PM, Thomas Monjalon wrote:
> 12/06/2023 13:58, zhoumin:
>> On Mon, June 12, 2023 at 6:26PM, Thomas Monjalon wrote:
>>> 15/05/2023 04:10, Zhang, Qi Z:
>>>> From: Ruifeng Wang <Ruifeng.Wang@arm.com<mailto:Ruifeng.Wang@arm.com>>
>>>>> From: Min Zhou <zhoumin@loongson.cn<mailto:zhoumin@loongson.cn>>
>>>>>> ---
>>>>>> v3:
>>>>>> - Use rte_smp_rmb() as the proper memory barrier instead of rte_rmb()
>>>>>> ---
>>>>>> v2:
>>>>>> - Make the calling of rte_rmb() for all platforms
>>>>>> ---
>>> [...]
>>>>> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com<mailto:ruifeng.wang@arm.com>>
>>>> Applied to dpdk-next-net-intel.
>>>>
>>>> Thanks
>>>> Qi
>>>>
>>> Why ignoring checkpatch?
>>> It is saying:
>>> "
>>> Warning in drivers/net/ixgbe/ixgbe_rxtx.c:
>>> Using rte_smp_[r/w]mb
>>> "
>>
>> I'm sorry. Should we never use rte_smp_[r/w]mb in the driver's code?
> No we should avoid.
> It has been decided to slowly replace such barriers.
> By the way, I think it is not enough documented.
> You can find an explanation in doc/guides/rel_notes/deprecation.rst
Thank your for providing the reference documents. I have read this file.
The explanation is clear and I get it.
> I think we should also add some notes to
> lib/eal/include/generic/rte_atomic.h
Yes, I do think so. The notes added at the definitions of
rte_smp_[r/w]mb are better.
> Tyler, Honnappa, Ruifeng, Konstantin, what do you think?
>
Yes, extra notes sounds like a reasonable thing to me.
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next prev parent reply other threads:[~2023-06-14 10:58 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20230424090532.367194-1-zhoumin@loongson.cn>
2023-05-06 10:23 ` Min Zhou
2023-05-08 6:03 ` Ruifeng Wang
2023-05-15 2:10 ` Zhang, Qi Z
2023-06-12 10:26 ` Thomas Monjalon
2023-06-12 11:58 ` zhoumin
2023-06-12 12:44 ` Thomas Monjalon
2023-06-13 1:42 ` zhoumin
2023-06-13 3:30 ` Jiawen Wu
2023-06-13 10:12 ` zhoumin
2023-06-14 10:58 ` Konstantin Ananyev [this message]
2023-06-13 9:25 ` Ruifeng Wang
2023-06-20 15:52 ` Thomas Monjalon
2023-06-21 6:50 ` Ruifeng Wang
2023-06-13 9:44 ` [PATCH v4] " Min Zhou
2023-06-13 10:20 ` Ruifeng Wang
2023-06-13 12:11 ` Zhang, Qi Z
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