linux-kernel - Re: [PATCH] sched/deadline: Use proc_douintvec

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Message-ID: <f24a539c-f6bf-5e5f-c98f-b31d6a5c1564@redhat.com>
Date:   Tue, 7 Jun 2022 10:45:29 +0200
From:   Daniel Bristot de Oliveira <bristot@...hat.com>
To:     Yajun Deng <yajun.deng@...ux.dev>
Cc:     linux-kernel@...r.kernel.org, mingo@...hat.com,
        peterz@...radead.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, bsegall@...gle.com, vschneid@...hat.com,
        rostedt@...dmis.org, mgorman@...e.de, vincent.guittot@...aro.org
Subject: Re: [PATCH] sched/deadline: Use proc_douintvec_minmax() limit minimum
 value

On 6/7/22 10:35, Yajun Deng wrote:
> June 7, 2022 3:55 PM, "Daniel Bristot de Oliveira" <bristot@...hat.com> wrote:
> 
>> Hi Yajun
>>
>> On 5/13/22 04:41, Yajun Deng wrote:
>>
>>> proc_dointvec() is not applicable for unsigned integer, use
>>> proc_douintvec_minmax() limit minimum value.
>> I understand your patch, but your log message is somehow incomplete.
>>
>> Could you expand on that, showing the problem using an example, and then how you
>> see it fixed?
>>
> This patch isn't a fix. It's just an optimization for match data and proc_handler in struct ctl_table.
> 
>> Also, could you please add the Fixes: tag so this patch can land on stable trees?
>>
> This statement 'if (period < min || period > max)' in __checkparam_dl() will work fine even if there hasn't this patch.
> So this patch may not need land on stable trees.
> 

Good, so you already know how to improve your log message.

-- Daniel