This bug was fixed in the package linux-azure - 6.2.0-1002.2
---------------
linux-azure (6.2.0-1002.2) lunar; urgency=medium
* lunar/linux-azure: 6.2.0-1002.2 -proposed tracker (LP: #2011602)
* Miscellaneous upstream changes
- Revert "UBUNTU: SAUCE: azure: x86/hyperv: Make swiotlb bounce buffer
allocation not just from low pages"
-- Paolo Pisati <[email protected]> Tue, 14 Mar 2023 17:30:00
+0100
** Changed in: linux-azure (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/2004090
Title:
Azure: Performance improvement for TDX
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure source package in Kinetic:
Fix Released
Bug description:
SRU Justification
[Impact]
ms_hyperv_init_platform() hides HV_MSR_REFERENCE_TSC_AVAILABLE for TDX
guests in favor of Invariant-TSC. In this case, we should also
downgrade the rating of hyperv_cs_msr.rating, so Invariant-TSC can be
used by default.
[Fix]
https://github.com/dcui/tdx.git
367f18c06ac999c2822b0c24f50a87994635d4bd
[Where things could go wrong]
TDX guests may perform worse.
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