** Changed in: linux-azure (Ubuntu Jammy)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1990184
Title:
Azure: Enable vPCI multi-MSI interrupts
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure source package in Jammy:
Fix Committed
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 protected]> 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:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=08e61e861a0e47e5e1a3fb78406afd6b0cea6b6d
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=455880dfe292a2bdd3b4ad6a107299fce610e64b
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4b77778ecc5bfbd4e77de1b2fd5c1dd3c655f1f
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a2bad844a67b1c7740bda63e87453baf63c3a7f7
[1] https://bugs.launchpad.net/bugs/1981577
[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
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