linux-kernel - Re: [External] Re: [PATCH] sched: RT bandwidth interface for cgroup unified hierarchy

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Message-ID: <d5d884c5-ed82-4ea9-4c08-e284d80239af@bytedance.com>
Date:   Wed, 22 Jun 2022 09:52:47 +0800
From:   Chengming Zhou <zhouchengming@...edance.com>
To:     Randy Dunlap <rdunlap@...radead.org>, mingo@...hat.com,
        peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, tj@...nel.org,
        lizefan.x@...edance.com, hannes@...xchg.org, corbet@....net
Cc:     cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH] sched: RT bandwidth interface for cgroup
 unified hierarchy

On 2022/6/21 23:59, Randy Dunlap wrote:
> Hi--
> 
> On 6/21/22 05:35, Chengming Zhou wrote:
>> diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
>> index 176298f2f4de..3d2949e16e04 100644
>> --- a/Documentation/admin-guide/cgroup-v2.rst
>> +++ b/Documentation/admin-guide/cgroup-v2.rst
>> @@ -1055,6 +1055,19 @@ All time durations are in microseconds.
>>  
>>  	The burst in the range [0, $MAX].
>>  
>> +  cpu.max.rt
>> +	A read-write two value file which exists on all cgroups when
> 
> 	             two-value
> 
>> +	CONFIG_RT_GROUP_SCHED enabled, to control CPU bandwidth for
> 
> 	                      is enabled,
> 
>> +	RT threads in the task group.
>> +
>> +	The maximum bandwidth limit.  It's in the following format::
>> +
>> +	  $MAX $PERIOD
>> +
>> +	which indicates that RT threads in the group may consume upto
> 
> 	                                                         up to
> 
>> +	$MAX in each $PERIOD duration.  "max" for $MAX indicates no
>> +	limit.  If only one number is written, $MAX is updated.
> 

Thanks for review, I will send v2 later.