linux-kernel - Re: [PATCH] sched/pelt: Fix bracket typo

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Date:   Wed, 8 Jun 2022 11:41:42 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     龍帆軒 <1030steven@...il.com>
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vschneid@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched/pelt: Fix bracket typo


On 6/8/22 09:30, 龍帆軒 wrote:
> 
>> Randy Dunlap <rdunlap@...radead.org <mailto:rdunlap@...radead.org>> 於 2022年6月8日 下午11:33 寫道：
>>
>>
>>
>> On 6/8/22 08:00, Steven Lung wrote:
>>> The second bracket describing the range is inverted, this patch
>>> will fix it.
>>>
>>> Signed-off-by: Steven Lung <1030steven@...il.com <mailto:1030steven@...il.com>>
>>> ---
>>> kernel/sched/pelt.c | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
>>> index 0f3107682..ed82cfba9 100644
>>> --- a/kernel/sched/pelt.c
>>> +++ b/kernel/sched/pelt.c
>>> @@ -233,7 +233,7 @@ ___update_load_sum(u64 now, struct sched_avg *sa,
>>>  * When syncing *_avg with *_sum, we must take into account the current
>>>  * position in the PELT segment otherwise the remaining part of the segment
>>>  * will be considered as idle time whereas it's not yet elapsed and this will
>>> - * generate unwanted oscillation in the range [1002..1024[.
>>
>> Is the above the same as                   range [1002..1024).
>> ?  I.e. 1002-1023 inclusive (or 1024 excluded)?
>>
>>> + * generate unwanted oscillation in the range [1002..1024].
>>>  *
>>>  * The max value of *_sum varies with the position in the time segment and is
>>>  * equals to :
>>
>> -- 
>> ~Randy
> 
> In the patch that the author submitted[1] for this comment, he mentioned that the value 1024 can be obtained. 
> So I think we should use brackets instead of parenthesis.
> 
> [1]: https://lore.kernel.org/all/20200506155301.14288-1-vincent.guittot@linaro.org/T/#u <https://lore.kernel.org/all/20200506155301.14288-1-vincent.guittot@linaro.org/T/#u>

OK, thanks for the link.

-- 
~Randy