[Bug 60839] scaling_max_freq cannot be set to values larger than bios_limit

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60839

--- Comment #4 from Sven Köhler <sven.koehler@gmail.com> ---
(In reply to Lan Tianyu from comment #3)
> > b) userspace should never be able to set scaling_max_freq to a value larger
> > than bios_limit
> 
> Actually, you can set the value larger than bios_limit and it will works
> when bios_limit raises.

That is exactly what didn't work! A write to the scaling_max_freq via sysfs was
clipped by bios_limit, as far as I can tell. It never want up again, after a
write to scaling_max_freq occured. I reproduced this having a small while loop
in the bash shell, that wrote the maximum CPU frequency to scaling_max_freq
while bios_limit was low.

I will try to reproduce the issue again and post the bash loop code here.

-- 
You are receiving this mail because:
You are the assignee for the bug.