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From: Tejun Heo <tj@kernel.org>
To: Qiurong Fang <fangqiurong@kylinos.cn>
Cc: sched-ext@lists.linux.dev, David Vernet <void@manifault.com>,
	Andrea Righi <arighi@nvidia.com>,
	Changwoo Min <changwoo@igalia.com>,
	Emil Tsalapatis <emil@etsalapatis.com>,
	linux-kernel@vger.kernel.org, tj@kernel.org
Subject: Re: [PATCH v2] sched_ext: Close the pre-enable ops error claim window
Date: Fri, 11 Sep 2026 05:24:45 -1000	[thread overview]
Message-ID: <664afc289472acecc783762fdf7a9baa@kernel.org> (raw)
In-Reply-To: <20260911024256.125287-1-fangqiurong@kylinos.cn>

Hello, Qiurong.

On Fri, Sep 11, 2026 at 10:42:56AM +0800, Qiurong Fang wrote:
> +		scx_tryset_enable_state(SCX_DISABLED, SCX_ENABLING);

All allocation failures precede ops->priv publication, so no disable can
race here and the state must still be SCX_ENABLING. Please use:

        WARN_ON_ONCE(scx_set_enable_state(SCX_DISABLED) != SCX_ENABLING);

Please also update the moved comment. Allocation failure still unwinds
locally. Full disabling on failure applies only after
scx_alloc_and_add_sched() succeeds.

Thanks.

-- 
tejun

  reply	other threads:[~2026-09-11 15:24 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-10  8:45 [PATCH] sched_ext: Close the pre-enable ops error claim window Qiurong Fang
2026-09-10  9:01 ` sashiko-bot
2026-09-10 21:40 ` Tejun Heo
2026-09-11  2:42 ` [PATCH v2] " Qiurong Fang
2026-09-11 15:24   ` Tejun Heo [this message]
2026-09-12 13:15   ` [PATCH v3] " Qiurong Fang
2026-09-13 15:59     ` Tejun Heo

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