** Also affects: linux-azure (Ubuntu Jammy)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1982613
Title:
Azure: multi-MSI patches break fio tests on NVMe
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure source package in Focal:
Fix Committed
Status in linux-azure source package in Jammy:
New
Bug description:
SRU Justification
[Impact]
Recent additions to focal/azure (5.4.0-1087.92) to support multi-MSI
on the Azure hypervisor break fio tests on NVMe disks by causing a
hung thread. The instance type used to demonstrate the failure was
Standard_L64s_v2.
The initial fix is to revert the 4 patches.
06ad0de407e7ab357f5be5c0dc2290e39ddbf936 PCI: hv: Fix interrupt mapping for
multi-MSI
6f7265bdd6161702cc1530ce7a2d126c49977d3d PCI: hv: Reuse existing IRTE
allocation in compose_msi_msg()
c6a7a02229c2acd4e19602f7b2fcd95ea163eada PCI: hv: Fix hv_arch_irq_unmask()
for multi-MSI
9dc3b7f1d164efda04c4756002011e2ddc9f1c73 PCI: hv: Fix multi-MSI to allow more
than one MSI vector
[Test Plan]
Run the attached reproducer script.
[Where things could go wrong]
Focal will not have support for multi-MSI, but since this is such a
new feature there is likely little consequence.
[Other]
SF: #00339521
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