Seg-fault crash with the VF removal on Azure VM

[madhukar mythri]

Hi,

We are facing a Seg-fault crash issue on our DPDK application with
"failsafe" PMD on Azure VM, when we toggle the Azure "Accelerated
networking" option.


On the running VM, when we toggle(disable/enable) the "Accelerated
networking" option, then we could see the respective SRIOV VF device was
removed and added back, at this time our DPDK application got crashed while
doing Rx "failsafe_rx_burst_fast()" operation.


As per the DPDK "failsafe" PMD design the hotplug is supported and even
after the primary SRIOV VF device is removed, the application can run Rx/Tx
operations seamlessly on the other sub-device("netvsc"). But, this is not
happening.


Does anybody tested this hot-plug functionality on Azure VM and hot-plug
works well on DPDK apps ?

Any known issues/limitations on the "failsafe" PMD hot-plug ?


DPDK-version: 23.11

Linux kernel-version: 5.15.0


Thanks,

Madhukar.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mails.dpdk.org/archives/users/attachments/20250630/e9c85140/attachment.htm>