linux-kernel - Re: [PATCH 1/2] kthread: convert worker lock to raw spinlock

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Message-ID: <20181005164627.m6w5s44s25dhu7ln@linutronix.de>
Date:   Fri, 5 Oct 2018 18:46:27 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Julia Cartwright <julia@...com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-rt-users@...r.kernel.org" <linux-rt-users@...r.kernel.org>,
        Steffen Trumtrar <s.trumtrar@...gutronix.de>,
        Tim Sander <tim@...eglstein.org>,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH 1/2] kthread: convert worker lock to raw spinlock

On 2018-09-28 21:03:51 [+0000], Julia Cartwright wrote:
> In order to enable the queuing of kthread work items from hardirq
> context even when PREEMPT_RT_FULL is enabled, convert the worker
> spin_lock to a raw_spin_lock.
> 
> This is only acceptable to do because the work performed under the lock
> is well-bounded and minimal.
> 
> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Cc: Guenter Roeck <linux@...ck-us.net>
> Reported-and-tested-by: Steffen Trumtrar <s.trumtrar@...gutronix.de>
> Reported-by: Tim Sander <tim@...eglstein.org>
> Signed-off-by: Julia Cartwright <julia@...com>

Acked-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

Sebastian