FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git cpufreq
commit 1dd8e212220cdec445793afb130d1634146e70aa ("x86 tsc: Use Sklake CPUID to distinguish cpu_khz and tsc_khz")

We found the following new message in kernel log after your commit.

[    0.000000] tsc: Fast TSC calibration failed
[    0.000000] tsc: Fast TSC calibration failed
[    0.000000] tsc: Unable to calibrate against PIT
[    0.000000] tsc: Unable to calibrate against PIT


Thanks,
Ying Huang