RE: [RFT][PATCH 1/3] PM: QoS: Introduce frequency QoS

["Doug Smythies" <dsmythies@telus.net>]

Apologies if people are getting this e-mail twice.
Because it had an attachment, I think it got deleted
from list distribution.

On 2019.11.16 23:35 Doug Smythies wrote:
> On 2019.10.16 03:41 Rafael J. Wysocki wrote:
>
> ... deleted ...
>
> Hi Rafael,
>
> Not sure, but I think it is this one that
> causes complaining when I try to set the
> intel_pstate driver to passive mode.
> I started from active mode, powersave governor,
> no HWP.
>
> Kernel: 5.4-rc7
>
> I did not go back and try previous 5.4 RCs.
> I did try kernel 5.3-rc8, because I already had
> it installed, and it worked fine.
>
> I use a script (for years), run as sudo:
>
> doug@s15:~/temp$ cat set_cpu_passive
> #! /bin/bash
> cat /sys/devices/system/cpu/intel_pstate/status
> echo passive > /sys/devices/system/cpu/intel_pstate/status
> cat /sys/devices/system/cpu/intel_pstate/status
>
> And I get this (very small excerpt):
>
> freq_qos_add_request() called for active request
> WARNING: CPU: 1 PID: 2758 at kernel/power/qos.c:763 freq_qos_add_request+0x4c/0xa0
> CPU: 1 PID: 2758 Comm: set_cpu_passive Not tainted 5.4.0-rc7-stock #727
> Failed to add freq constraint for CPU0 (-22)
>
> freq_qos_add_request() called for active request
> WARNING: CPU: 1 PID: 2758 at kernel/power/qos.c:763 freq_qos_add_request+0x4c/0xa0
> CPU: 1 PID: 2758 Comm: set_cpu_passive Tainted: G        W         5.4.0-rc7-stock #727
> Failed to add freq constraint for CPU1 (-22)
>
> ...
>
> I'll attach the whole thing, but it will likely get removed
> from the general list e-mails.
>
> ... Doug

I forgot to mention, other than the error messages,
things seems to work fine.

If anyone wants to see what was the attachment, it
is here (for a few days):

http://www.smythies.com/~doug/temp_kernel/rjw.txt