[dpdk-dev] Questions about vdpa patch--handle hardware error

[dpdk-dev] Questions about vdpa patch--handle hardware error

[Zhongjinming]

Hi all,
I find a patch about vdpa driver of dpdk --vdpa/mlx5: handle hardware error
  I want to know ,what is scenario of this patch?
   Our enviroment is  dpdk19.11 +some patches from Mellanox ,and Connect6 DX.
We tested vdpa by taking a long time of iperf between two VMs , but found that VMs cannot send any package.
Maybe we should apply this patch.

  About this path
When hardware error happens, vdpa didn't get such information and leave
driver in silent: working state but no response.

This patch subscribes firmware virtq error event and try to recover max
3 times in 3 seconds, stop virtq if max retry number reached.

When error happens, PMD log in warning level. If failed to recover,
outputs error log. Query virtq statistics to get error counters report.

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