On Sat, 2016-11-05 at 15:04 +0100, Pavel Machek wrote:

On Sat 2016-11-05 14:53:13, Pavel Machek wrote:

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Hi!

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Ok, can do, let me recompile and reboot.

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When temperature limit is
reached acpi_processor_ppc_notifier()
should
be called.

No, that's not correct for ACPI passive trip points, is it? If
I
recall correctly, those should be monitored even when
temperature is
below them so that it does not reach them...?

No if BIOS is sending PPC, it will be called. You can try first
in 4.8.

Also try

Don't run workload, just on an idle system.

# echo 1 > /sys/class/thermal/cooling_device2/cur_state
monitor the scaling_max_freq, it should reduce

# echo 2 > /sys/class/thermal/cooling_device2/cur_state
monitor the scaling_max_freq, it should reduce

Yes, this seems to work. scaling_max goes to 1.5, then 1.1. Also
under
load, scaling_max_freq changes. But at that point, we are already
around 98C... and bios_limit stays the same all the time in v4.9.

...while in v4.8-rc1, bios limit goes to 1.0 GHz at 90C, and
temperature just doesn't go above that.

Does it make sense to try with v4.8-final?

I sent some suggestion to try in previous email to add more prints and
enable debug in acpi-cpufreq. Let's try that first. We need to fix
anyway even if 4.8-final has this issue.

Thanks,
Srinivas

Best regards,
								Pavel