powernow_k8 causes kernel panic during block device write access
https://bugzilla.kernel.org/show_bug.cgi?id=120561
Zhang Rui <[email protected]> changed:
What |Removed |Added
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CC| |[email protected] Component|Other |cpufreq Hardware|Intel |x86-64 Assignee|[email protected] |[email protected]
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https://bugzilla.kernel.org/show_bug.cgi?id=120561
[email protected] changed:
What |Removed |Added
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Status|NEW |RESOLVED
Resolution|--- |CODE_FIX--- Comment #3 from [email protected] ---
It seems this bug was caused by the kernel misidentifying the number of available PowerNow states on certain AMD CPUs, and was thus very CPU-specific.
As of right now, none of the currently supported kernels (4.4.184, 4.9.184, 4.14.131, 4.19.56, and 5.1.15) have any issues with the particular AMD CPU on the system that originally exhibited the problem.
The newer kernels all report significantly fewer power states, and the ondemand governor can now be enabled without issue.
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