[REGRESSION] Random 'clocksource: Watchdog remote CPU ?? read timed out'

[REGRESSION] Random 'clocksource: Watchdog remote CPU ?? read timed out'

[Dr. David Alan Gilbert]

Hi all,
  I've noticed in my logs on every boot since 7.1.x a:

[    6.749566] clocksource: Watchdog remote CPU 11 read timed out

with the CPU being different each time.  There's no apparent bad
side effects or anything, but it seemed worth reporting and I noticed
It's only one each boot as far as I can tell.

I checked back through journalctl -b -...  and the first time I got
it was the first 7.1.x boot, and I remember seeing this during rc's
as well but that was on a bit of a random build.

The current ones are happening on Fedora's 7.1.5-201.fc44.x86_64

dg@dalek:~$ sudo dmesg|grep -i watchdog 
[    0.381705] NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
[    2.244379] sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver
[    2.253962] sp5100-tco sp5100-tco: Using 0xfeb00000 for watchdog MMIO address
[    6.749566] clocksource: Watchdog remote CPU 11 read timed out
dg@dalek:~$ sudo journalctl -b -1 |grep -i Watchdog
Aug 02 11:52:48 dalek kernel: NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
Aug 02 11:52:49 dalek kernel: sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver
Aug 02 11:52:49 dalek kernel: sp5100-tco sp5100-tco: Using 0xfeb00000 for watchdog MMIO address
Aug 02 11:53:00 dalek rtkit-daemon[1703]: Watchdog thread running.
Aug 02 11:53:17 dalek kernel: clocksource: Watchdog remote CPU 26 read timed out
dg@dalek:~$ sudo journalctl -b -2 |grep -i Watchdog
Aug 01 12:14:48 dalek kernel: NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
Aug 01 12:14:49 dalek kernel: sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver
Aug 01 12:14:49 dalek kernel: sp5100-tco sp5100-tco: Using 0xfeb00000 for watchdog MMIO address
Aug 01 12:15:00 dalek rtkit-daemon[1697]: Watchdog thread running.
Aug 01 12:15:16 dalek kernel: clocksource: Watchdog remote CPU 24 read timed out
dg@dalek:~$ sudo journalctl -b -3 |grep -i Watchdog
Jul 31 12:16:33 dalek kernel: NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
Jul 31 12:16:34 dalek kernel: sp5100_tco: SP5100/SB800 TCO WatchDog Timer Driver
Jul 31 12:16:34 dalek kernel: sp5100-tco sp5100-tco: Using 0xfeb00000 for watchdog MMIO address
Jul 31 12:16:44 dalek rtkit-daemon[1696]: Watchdog thread running.
Jul 31 12:16:48 dalek kernel: clocksource: Watchdog remote CPU 31 read timed out

dg@dalek:~$ lscpu
Architecture:                x86_64
  CPU op-mode(s):            32-bit, 64-bit
  Address sizes:             43 bits physical, 48 bits virtual
  Byte Order:                Little Endian
CPU(s):                      32
  On-line CPU(s) list:       0-31
Vendor ID:                   AuthenticAMD
  Model name:                AMD Ryzen 9 3950X 16-Core Processor
    CPU family:              23
    Model:                   113
    Thread(s) per core:      2
    Core(s) per socket:      16
    Socket(s):               1
    Stepping:                0
    Frequency boost:         enabled
    CPU(s) scaling MHz:      50%
    CPU max MHz:             4761.2300
    CPU min MHz:             2200.0000
    BogoMIPS:                6986.90
    Flags:                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr
                              sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xto
                             pology nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx1
                             6 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr
                             8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_cor
                             e perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vm
                             mcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsav
                             eopt xsavec xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsav
                             eerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid 
                             decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid o
                             verflow_recov succor smca sev sev_es

Thanks,

Dave

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