Azure: Enable vPCI multi-MSI interrupts
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-azure (Ubuntu) |
Fix Released
|
Medium
|
Tim Gardner | ||
Jammy |
Fix Released
|
Medium
|
Tim Gardner |
Bug Description
SRU Justification
[Impact]
This is a 2nd attempt with this patch set. The first attempt [1] caused a regression.
The Hyper-V vPCI driver (pci-hyperv) doesn't work with a PCIe devcie that supports multiple MSI interrupts (Note: MSI-X has been working fine). Recently Jeffrey Hugo <email address hidden> made 4 patches to the vPCI driver so multiple-MSI can work now. Please consider picking up the 4 patches into the linux-azure kernels for Ubuntu LTS 18.04, 20.04 and 22.04:
[1] https:/
[Test Plan]
Microsoft tested: " I tested the kernel and it worked as expected, i.e. we still have the multi-MSI capability and I no longer see the soft lockup issue with fio + NVMe + the L64s_v2 VM size."
[Where things could go wrong]
vPCI devices may no get interrupts
[Other Info]
SF: #00339521
CVE References
affects: | linux (Ubuntu) → linux-azure (Ubuntu) |
Changed in linux-azure (Ubuntu): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
importance: | Undecided → Medium |
status: | New → In Progress |
status: | In Progress → Fix Released |
Changed in linux-azure (Ubuntu Jammy): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
importance: | Undecided → Medium |
status: | New → In Progress |
summary: |
- Azure: Enable multi-vPCI MSI interrupts + Azure: Enable vPCI multi-MSI interrupts |
description: | updated |
Changed in linux-azure (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
This bug is awaiting verification that the linux-azure/ 5.15.0- 1021.26 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification- needed- jammy' to 'verification- done-jammy' . If the problem still exists, change the tag 'verification- needed- jammy' to 'verification- failed- jammy'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!