Re: [PATCH] x86/mce: Fix timer interval adjustment after logging a MCE event

[Borislav Petkov]

Ok,

I can repro in a guest here too:

[  316.791005] mce: [Hardware Error]: Machine check events logged
[  316.793836] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9c2041000000011b
[  316.797398] mce: [Hardware Error]: TSC 0 ADDR 6d3d483b 
[  316.800013] mce: [Hardware Error]: PROCESSOR 2:800f82 TIME 1768404431 SOCKET 0 APIC 0 microcode 800820d
[  628.086857] mce: [Hardware Error]: Machine check events logged
[  628.089625] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9c2041000000011b
[  628.093156] mce: [Hardware Error]: TSC 0 ADDR 6d3d483b 
[  628.095739] mce: [Hardware Error]: PROCESSOR 2:800f82 TIME 1768404743 SOCKET 0 APIC 0 microcode 800820d
[  939.382727] mce: [Hardware Error]: Machine check events logged
[  939.385593] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9c2041000000011b
[  939.389194] mce: [Hardware Error]: TSC 0 ADDR 6d3d483b 
[  939.391690] mce: [Hardware Error]: PROCESSOR 2:800f82 TIME 1768405054 SOCKET 0 APIC 0 microcode 800820d
[ 1250.678672] mce: [Hardware Error]: Machine check events logged
[ 1250.681584] mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: 9c2041000000011b
[ 1250.685221] mce: [Hardware Error]: TSC 0 ADDR 6d3d483b 
[ 1250.687786] mce: [Hardware Error]: PROCESSOR 2:800f82 TIME 1768405365 SOCKET 0 APIC 0 microcode 800820d

Timestamps are consistent with the observation.

Now on to find what causes this. Even if we can't find the proper commit,
I guess testing 6.18 and 6.12 - the LTS kernels - should be good enough as to
backport a fix there.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette