Public bug reported:
If I enable SRIOV in a Mellanox CX4 card while a PF interface is doing
something like a ping flood. The PF interface will stop pinging.
We found a small window were MMIO are bein g disabled during pci_enable_sriov
---Additional Hardware Info---
It needs a Mellanox CX4 SRIOV capable to recreate this issue
Machine Type = P8
---Steps to Reproduce---
just configure the IP address of PF interface and start like a ping flood to
then do this echo to enable SRIOV on the PF.
echo 8 > /sys/class/net/enP1p1s0f0/device/sriov_numvfs
Then you will notice the ping flood will stop.
A patch that will fix this issue was sent for review:
** Affects: linux (Ubuntu)
Assignee: Taco Screen team (taco-screen-team)
** Tags: architecture-ppc64le bugnameltc-146479 severity-high
** Tags added: architecture-ppc64le bugnameltc-146479 severity-high
** Changed in: ubuntu
Assignee: (unassigned) => Taco Screen team (taco-screen-team)
** Package changed: ubuntu => linux (Ubuntu)
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Ubuntu 16.10 KVM SRIOV: if enable sriov while ping flood is running
ping will stop working
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