On 27/02/2023 00:35, Zhang, Qi Z wrote:


Hi Simei/Qi/Yu


-----Original Message-----
From: Su, Simei <simei...@intel.com>
Sent: Monday, February 20, 2023 4:00 PM
To: Xing, Beilei <beilei.x...@intel.com>; Zhang, Yuying
<yuying.zh...@intel.com>; Zhang, Qi Z <qi.z.zh...@intel.com>;
david.march...@redhat.com
Cc: dev@dpdk.org; Yang, Qiming <qiming.y...@intel.com>; Su, Simei
<simei...@intel.com>; sta...@dpdk.org
Subject: [PATCH v6] net/i40e: rework maximum frame size configuration

One issue is reported by David Marchand that error occurs in OVS due to the
fix patch in mentioned changes below. The detailed reproduce step and
result are in https://patchwork.dpdk.org/project/dpdk/patch/
20211207085946.121032-1-dapengx...@intel.com/.

This patch removes unnecessary link status check and directly sets mac config
in dev_start. Also, it sets the parameter "wait to complete" true to wait for
more time to make sure adminq command execute completed.


Fixes: a4ba77367923 ("net/i40e: enable maximum frame size at port level")
Fixes: 2184f7cdeeaa ("net/i40e: fix max frame size config at port level")
Fixes: 719469f13b11 ("net/i40e: fix jumbo frame Rx with X722")
Cc: sta...@dpdk.org

These patches caused an observable regression in multiple 20.11 and 21.11 LTS releases that was only caught a long time after releases.

Is there anything being added to LTS validation for regression testing this issue, so we don't get caught again?

After reverting the original patch and 2 fixes, I'm a bit reluctant to take more fixes without some form of regression testing in place.

thanks,
Kevin.


Reported-by: David Marchand <david.march...@redhat.com>
Signed-off-by: Simei Su <simei...@intel.com>

Acked-by: Qi Zhang <qi.z.zh...@intel.com>

Applied to dpdk-next-net-intel.

Thanks
Qi


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