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https://lists.ubuntu.com/archives/kernel-team/2017-January/081830.html
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Also affects: linux (Ubuntu Yakkety)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1625318
Title:
Ubuntu 16.10 KVM SRIOV: if enable sriov while ping flood is running
ping will stop working
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
In Progress
Status in linux source package in Yakkety:
In Progress
Status in linux source package in Zesty:
Fix Released
Bug description:
---Problem Description---
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 is called.
---uname output---
4.4.0-30-generic
---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 that interface.
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:
https://patchwork.ozlabs.org/patch/671517/
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