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From: Tejun Heo <tj@kernel.org>
To: Qiurong Fang <fangqiurong@kylinos.cn>
Cc: void@manifault.com, arighi@nvidia.com, changwoo@igalia.com,
	sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched_ext: Skip per-CPU data allocation for built-in DSQs
Date: Mon, 31 Aug 2026 06:13:11 -1000	[thread overview]
Message-ID: <apWoF6Czswh-sO6V@slm.duckdns.org> (raw)
In-Reply-To: <20260827082329.3368255-1-fangqiurong@kylinos.cn>

Hello,

On Thu, Aug 27, 2026 at 04:23:29PM +0800, Qiurong Fang wrote:
> From: fangqiurong <fangqiurong@kylinos.cn>
> 
> 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

  parent reply	other threads:[~2026-08-31 16:13 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-27  8:23 Qiurong Fang
2026-08-27  9:38 ` Zhan Xusheng
2026-08-31 16:13 ` Tejun Heo [this message]
2026-09-01  1:32 ` [PATCH v2] " Qiurong Fang
2026-09-01  2:20   ` Zhan Xusheng
2026-09-02  6:57   ` Tejun Heo

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