[hyper-v] reloading netvsc issue on linux-azure 4.13.0-1001.1
Bug #1735546 reported by
Chris Valean
This bug affects 2 people
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-azure (Ubuntu) |
Fix Committed
|
Undecided
|
Marcelo Cerri | ||
Xenial |
Fix Released
|
Undecided
|
Marcelo Cerri | ||
linux-azure-edge (Ubuntu) |
Fix Committed
|
Undecided
|
Marcelo Cerri | ||
Xenial |
Fix Committed
|
Undecided
|
Marcelo Cerri |
Bug Description
On proposed 4.13.0-1001.1 linux-azure kernel reloading the netvsc module will cause the VM network to stop working on WS2016.
Manual repro is easy, start a VM with that kernel and run:
modprobe -r hv_netvsc
modprobe hv_netvsc
At this point the command will hang and after 2 minutes the hung task messages will appear.
Test env info:
- ubuntu 16.04.3
- Affected platforms:
a) WS2016 and WS2016 fall update - 1709
b) WS2012R2
4.11 series linux-azure are not showing this behavior.
Changed in linux-azure (Ubuntu): | |
status: | Confirmed → Fix Committed |
Changed in linux-azure (Ubuntu Xenial): | |
status: | New → Fix Committed |
Changed in linux-azure (Ubuntu): | |
assignee: | nobody → Marcelo Cerri (mhcerri) |
Changed in linux-azure (Ubuntu Xenial): | |
assignee: | nobody → Marcelo Cerri (mhcerri) |
Changed in linux-azure-edge (Ubuntu): | |
assignee: | nobody → Marcelo Cerri (mhcerri) |
Changed in linux-azure-edge (Ubuntu Xenial): | |
assignee: | nobody → Marcelo Cerri (mhcerri) |
Changed in linux-azure-edge (Ubuntu): | |
status: | New → Fix Committed |
Changed in linux-azure-edge (Ubuntu Xenial): | |
status: | New → Fix Committed |
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Adding this issue here, as in the past we saw linked issues between netvsc reload and mtu change.
The same hung task failure occurs when changing the MTU on the interface.
Repro steps:
ip link set dev eth0 mtu 3000
ip link set dev eth0 mtu 4500
At this point the command will hang and then run into the hung messages after 120 seconds.