From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: John Stultz <john.stultz@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
lkml <linux-kernel@vger.kernel.org>,
Will Deacon <will@kernel.org>
Subject: Re: BUG: Invalid wait context with 5.7-rc2?
Date: Thu, 23 Apr 2020 20:49:55 +0200 [thread overview]
Message-ID: <20200423184955.c7yij2hg7a2ftsfa@linutronix.de> (raw)
In-Reply-To: <20200423171029.GS17661@paulmck-ThinkPad-P72>
On 2020-04-23 10:10:29 [-0700], Paul E. McKenney wrote:
> > Curious if this was already on anyone's radar?
>
> Looks like __queue_work() is attempting to acquire a normal spinlock_t
> with interrupts disabled, which -rt doesn't like much. And I believe
> that lockdep has been upgraded to check for this.
>
> Adding Sebastian for his thoughts.
This is known. There is more than just workqueue in this regard. Please
disable CONFIG_PROVE_RAW_LOCK_NESTING until this is fixed (see Kconfig
help). Except for workqueue, there is also printk which triggers the
same warning and isn't as easy to fix as workqueue.
> Thanx, Paul
Sebastian
next prev parent reply other threads:[~2020-04-23 18:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-23 16:40 John Stultz
2020-04-23 17:10 ` Paul E. McKenney
2020-04-23 18:49 ` Sebastian Andrzej Siewior [this message]
2020-04-23 18:52 ` John Stultz
2020-04-23 17:18 ` Valentin Schneider
2020-04-23 17:29 ` John Stultz
2020-04-23 17:46 ` Valentin Schneider
2020-04-23 17:58 ` John Stultz
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