linux-kernel - Re: [PATCH] thermal: remove power allocator from list of default governors

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Date:	Wed, 5 Aug 2015 09:37:55 +0100
From:	Javi Merino <javi.merino@....com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Eduardo Valentin <edubezval@...il.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Tushar Dave <tushar.n.dave@...el.com>,
	Lan Tianyu <tianyu.lan@...el.com>,
	Punit Agrawal <Punit.Agrawal@....com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] thermal: remove power allocator from list of default
 governors

On Tue, Aug 04, 2015 at 05:39:21PM +0100, Dmitry Torokhov wrote:
> As it currently stands the power allocator governor can not handle
> thermal zones that are not specifically crafted and therefore can not be
> used as a default governor.
> 
> Users need to explicitly enable this governor for thermal zones that do
> have enough information for its operation.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>  drivers/thermal/Kconfig | 8 --------
>  1 file changed, 8 deletions(-)
> 
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index 0390044..34d05d3 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -82,14 +82,6 @@ config THERMAL_DEFAULT_GOV_USER_SPACE
>  	  Select this if you want to let the user space manage the
>  	  platform thermals.
>  
> -config THERMAL_DEFAULT_GOV_POWER_ALLOCATOR
> -	bool "power_allocator"
> -	select THERMAL_GOV_POWER_ALLOCATOR
> -	help
> -	  Select this if you want to control temperature based on
> -	  system and device power allocation. This governor can only
> -	  operate on cooling devices that implement the power API.
> -

Currently the only way we have for a thermal zone configured from
device tree to use a governor from the kernel boot is by using
THERMAL_DEFAULT_GOV_*.  If we remove this option some devices won't
have a workable thermal framework until userspace is up and running.

Would you rather have the power allocator governor accept every
thermal zone?

Cheers,
Javi
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