linux-kernel - Re: next: possible circular locking dependency: perf vs printk

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Message-ID: <YyHFbhDIvU++Q4Hh@hirez.programming.kicks-ass.net>
Date:   Wed, 14 Sep 2022 14:13:34 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sergey Senozhatsky <senozhatsky@...omium.org>
Cc:     Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        John Ogness <john.ogness@...utronix.de>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: next: possible circular locking dependency: perf vs printk

On Wed, Sep 14, 2022 at 07:22:15PM +0900, Sergey Senozhatsky wrote:
> Hello folks,
> 
> The lockdep splat below is pretty interesting. If I understand it
> correctly:

Known thing; only happens because you trip a WARN, fix that, problem
goes away.