linux-kernel - Re: [RFC PATCH 0/2] RT scheduling policies for workqueues

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Message-ID: <YkKnlUUsufZPiZxM@linutronix.de>
Date:   Tue, 29 Mar 2022 08:30:45 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Tejun Heo <tj@...nel.org>
Cc:     Marc Kleine-Budde <mkl@...gutronix.de>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Peter Hurley <peter@...leysoftware.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Esben Haabendal <esben@...nix.com>,
        Steven Walter <stevenrwalter@...il.com>,
        linux-kernel@...r.kernel.org,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        André Pribil <a.pribil@...k-ipc.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        linux-rt-users@...r.kernel.org
Subject: Re: [RFC PATCH 0/2] RT scheduling policies for workqueues

On 2022-03-28 07:39:25 [-1000], Tejun Heo wrote:
> Hello,
Hi,

> I wonder whether it'd be useful to provide a set of wrappers which can make
> switching between workqueue and kworker easy. Semantics-wise, they're
> already mostly aligned and it shouldn't be too difficult to e.g. make an
> unbounded workqueue be backed by a dedicated kthread_worker instead of
> shared pool depending on a flag, or even allow switching dynamically.

This could work. For the tty layer it could use 'lowlatency' attribute
to decide which implementation makes sense.

> Thanks.
> 

Sebastian