ubuntu_kvm_unit_test:tsc_adjust: FAIL: MSR_IA32_TSC_ADJUST msr adjustment on tsc write

[Stefan Bader]

On rizzo(amd64) with lowlatency flavour:

21:50:00 DEBUG| [stdout] PASS: MSR_IA32_TSC_ADJUST msr initialization
21:50:00 DEBUG| [stdout] PASS: MSR_IA32_TSC_ADJUST msr read / write
21:50:00 DEBUG| [stdout] PASS: TSC adjustment for MSR_IA32_TSC_ADJUST value
21:50:00 DEBUG| [stdout] PASS: MSR_IA32_TSC_ADJUST msr read / write
21:50:00 DEBUG| [stdout] FAIL: MSR_IA32_TSC_ADJUST msr adjustment on tsc write
21:50:00 DEBUG| [stdout] SUMMARY: 5 tests, 1 unexpected failures

[Stefan Bader (smb)]

Actually the same for generic and lowlatency which both ran on rizzo.

[Stefan Bader (smb)]

That one only on lowlatency.

[Krzysztof Kozlowski (krzk)]

In the past appeared also as lp:1845902 although that one was closed as not-reproducible.

[Marcelo Cerri (mhcerri)]

I'm seeing this same error with bionic/linux-azure-5.4 5.4.0-1062.65~18.04.1 only on one specific instance (Standard_D4s_v3).

[Po-Hsu Lin (cypressyew)]

Found on Impish 5.13.0-23.23 on node gonzo with lowlatency kernel.

[Francis Ginther (fginther)]

Found on focal 5.4 on AMD Epyc based system.

[Po-Hsu Lin (cypressyew)]

This issue does not exist on the reported node, rizzo, with linux-lowlatency/5.15.0-43.46