linux-kernel - Re: [PATCH 13/14] lockdep: Prepare for NMI IRQ state tracking

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Message-ID: <20200529182827.64a5f58d@oasis.local.home>
Date:   Fri, 29 May 2020 18:28:27 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     tglx@...utronix.de, luto@...capital.net,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        sean.j.christopherson@...el.com, andrew.cooper3@...rix.com,
        daniel.thompson@...aro.org, a.darwish@...utronix.de,
        bigeasy@...utronix.de
Subject: Re: [PATCH 13/14] lockdep: Prepare for NMI IRQ state tracking

On Sat, 30 May 2020 00:25:05 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> > > +	if (DEBUG_LOCKS_WARN_ON(current->lockdep_recursion & LOCKDEP_RECURSION_MASK))
> > >  		return;  
> 
> ^^ there's your regular recursion check.

Yes, but this is more of a "bug if it happens" than just "ignore it".

-- Steve