Re: [PATCH v2 5/6] sched/deadline: Create DL BW alloc, free & check overflow interface

[Dietmar Eggemann]

On 04/05/2023 10:15, Juri Lelli wrote:
> On 04/05/23 08:23, Peter Zijlstra wrote:
>> On Wed, May 03, 2023 at 09:22:27AM +0200, Juri Lelli wrote:
>>> From: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
>>>
>>> Rework the existing dl_cpu_busy() interface which offers DL BW overflow
>>> checking and per-task DL BW allocation.
>>>
>>> Add dl_bw_free() as an interface to be able to free DL BW.
>>> It will be used to allow freeing of the DL BW request done during
>>> cpuset_can_attach() in case multiple controllers are attached to the
>>> cgroup next to the cpuset controller and one of the non-cpuset
>>> can_attach() fails.
>>>
>>> dl_bw_alloc() (and dl_bw_free()) now take a `u64 dl_bw` parameter
>>> instead of `struct task_struct *p` used in dl_cpu_busy().  This allows
>>> to allocate DL BW for a set of tasks too rater than only for a single
>>> task.
>>>
>>
>> Changlog fails the 'why' test.
>>
> 
> Dietmar, if you could please add (or rework) the 'why' as a reply to
> this email, I can fold in v3.
> 
> Thanks!
> 

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