linux-kernel - Re: [RFC][PATCH] hrtimer: Use printk_deferred_once for hrtimer

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Message-ID: <CANDhNCoHqX9fo5e=K7_74YSmV8-T2tE-Obu+phhqy+n2bqc4QQ@mail.gmail.com>
Date: Thu, 22 Feb 2024 08:45:51 -0800
From: John Stultz <jstultz@...gle.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, Frederic Weisbecker <frederic@...nel.org>, 
	Steven Rostedt <rostedt@...dmis.org>, kernel-team@...roid.com, 
	John Ogness <jogness@...utronix.de>
Subject: Re: [RFC][PATCH] hrtimer: Use printk_deferred_once for
 hrtimer_interrupt message

On Thu, Feb 22, 2024 at 7:17 AM Thomas Gleixner <tglx@...utronix.de> wrote:
>
> On Wed, Feb 21 2024 at 21:12, John Stultz wrote:
>
> Cc+ John. Keeping context intact,
>
> > With qemu, I constantly see lockdep warnings after the
> > hrimter_interrupt message is printed:
> >
> > [   43.434557] hrtimer: interrupt took 6517564 ns
> > [   43.435000]
> > [   43.435000] =============================
> > [   43.435000] [ BUG: Invalid wait context ]
>
> Do you have PROVE_RAW_LOCK_NESTING enabled?

Yes, I do. Let me know if there's anything else you'd like me to try.

thanks
-john