linux-kernel - Re: [PATCH v2] locktorture: Add raw_spinlock* torture tests for PREEMPT

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Date:   Thu, 23 Feb 2023 19:12:32 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Zqiang <qiang1.zhang@...el.com>
Cc:     paulmck@...nel.org, josh@...htriplett.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] locktorture: Add raw_spinlock* torture tests for
 PREEMPT_RT kernels

On Fri, 24 Feb 2023, Zqiang wrote:

>In PREEMPT_RT kernels, both spin_lock() and spin_lock_irq() are converted
>to sleepable rt_spin_lock().  This means that the interrupt related suffix
>for spin_lock/unlock(_irq, irqsave/irqrestore) do not affect the CPU's
>interrupt state. This commit therefore adds raw spin-lock torture tests.
>This in turn permits pure spin locks to be tested in PREEMPT_RT kernels.
>
>Suggested-by: Paul E. McKenney <paulmck@...nel.org>
>Suggested-by: Davidlohr Bueso <dave@...olabs.net>
>Signed-off-by: Zqiang <qiang1.zhang@...el.com>

Reviewed-by: Davidlohr Bueso <dave@...olabs.net>