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

[Peter Zijlstra]

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.