Re: [PATCH] sched_ext: Skip per-CPU data allocation for built-in DSQs

[Tejun Heo]

Hello,

On Thu, Aug 27, 2026 at 04:23:29PM +0800, Qiurong Fang wrote:
> From: fangqiurong <fangqiurong@xxxxxxxxxx>
> 
> Deferred reenqueue tracking is only supported for user DSQs:
> schedule_dsq_reenq() serves the local DSQ through
> sch->pcpu->deferred_reenq_local and rejects all other built-in DSQ
> ids. Every built-in DSQ still carries nr_cpu_ids * sizeof(struct
> scx_dsq_pcpu) bytes of dead per-CPU memory.
> 
> Skip the allocation for built-in DSQ ids.

Let's rename it to dsq->pcpu_user while at it.

Thanks.

-- 
tejun