Re: [docs] [PATCH 1/2] runqueue: decrease the verbosity of pressure messages

["Antonin Godard" <antonin.godard@bootlin.com>]

Hi Martin,

On Fri Apr 11, 2025 at 9:09 PM CEST, Martin Jansa wrote:
> On Fri, Apr 11, 2025 at 4:46 PM Antonin Godard via
> lists.yoctoproject.org
> <antonin.godard=bootlin.com@lists.yoctoproject.org> wrote:
>>
>> By default all the pressure changes are printed on the console and
>> generate a lot of spam to users using the BB_PRESSURE_* variables.
>> Decrease the default verbosity to bb.debug (level 1, so can be seen with
>> -D).
>
> Isn't "a lot of these messages" a proof that the BB_PRESSURE_*
> variables aren't set correctly?
>
> I find them quite useful and using -D by default in my builds would
> bring even "more spam". But in worse case I'll just revert this for my
> builds.

I see how these messages can be useful.

To my understanding, having a low value for BB_PRESSURE_* variables will
generate a lot of these messages. To me, it does not necessarily mean that the
value isn't properly set, it just means that you want to limit the pressure a
lot.

Maybe the default behavior of printing everything is good for adjustments, I
just think it'd be convenient for user to have a way to disable those once they
are happy with their pressure configuration.

I thought first of a BB_PRESSURE_VERBOSE or BB_PRESSURE_QUIET variable. It
would just allow enabling/disabling these messages. But on second thought, I'm
not sure an extra variable is necessary when we could just move these messages
to debug messages. Other variables that limit the load do not generate such
"spam" (take BB_LOADFACTOR_MAX for example).

What do you think?

Antonin

--
Antonin Godard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com