Re: [PATCH] sched/fair: Fix util_est UTIL_AVG_UNCHANGED handling

[Dietmar Eggemann <dietmar.eggemann@arm.com>]

On 28/05/2021 08:25, Xuewen Yan wrote:
> On Fri, May 28, 2021 at 6:38 AM Dietmar Eggemann
> <dietmar.eggemann@arm.com> wrote:
>>
>> On 27/05/2021 07:41, Xuewen Yan wrote:
>>> Hi
>>>
>>> On Wed, May 26, 2021 at 10:59 PM Dietmar Eggemann
>>> <dietmar.eggemann@arm.com> wrote:
>>>>
>>>> On 19/05/2021 18:06, Vincent Donnefort wrote:
>>>>> On Fri, May 14, 2021 at 12:37:48PM +0200, Dietmar Eggemann wrote:

[...]

>>> IMHO, Maybe it would be better to put it in the util_est structure
>>> just like UTIL_EST_WEIGHT_SHIFT?
>>
>> Yeah, can do.
>>
>> I just realized that 'kernel/sched/pelt.h' does not include
>> <linux/sched.h> directly (or indirectly via "sched.h". But I can easily
>> move cfs_se_util_change() (which uses UTIL_AVG_UNCHANGED) from pelt.h to
>> pelt.c, its only consumer anyway.
> 
> Since there are so many questions, why not add ( #include "pelt.h" )
> directly into (kernel/sched/debug.c)?
> 
> diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
> index 9c882f20803e..dde91171d4ae 100644
> --- a/kernel/sched/debug.c
> +++ b/kernel/sched/debug.c
> @@ -7,6 +7,7 @@
>   * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar
>   */
>  #include "sched.h"
> +#include "pelt.h"

Didn't want to expose PELT internals unnecessarily.

And ... turns out that the include dependency `"sched.h" before
"pelt.h"` exists for much more things than just UTIL_AVG_UNCHANGED. So I
think I don't have to care about the issue in this case.

I sent out a v2 addressing your comment.