linux-kernel - Re: [BUG v6.0-rc2] lockdep splat on ct_kernel

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Message-ID: <20220822204825.3e88b1a4@rorschach.local.home>
Date:   Mon, 22 Aug 2022 20:48:25 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [BUG v6.0-rc2] lockdep splat on ct_kernel_enter()

On Mon, 22 Aug 2022 18:38:36 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> > The warning happens with the commit, and does not for the commit just
> > before it is applied.
> >   
> 
> Nevermind, I tested the wrong kernel (the grub reboot failed to boot to the
> new kernel). But it did give me a different lockdep splat when I tested the
> right kernel :-/
> 
> I'll investigate some more.

I was close. It was this commit:

ed4ae5eff4b3 ("rcu: Apply noinstr to rcu_idle_enter() and rcu_idle_exit()")

that causes the new error message.

-- Steve