linux-kernel - Re: [PATCH RFC v6 00/21] DEPT(Dependency Tracker)

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Message-ID: <20220510101254.33554885@gandalf.local.home>
Date:   Tue, 10 May 2022 10:12:54 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Byungchul Park <byungchul.park@....com>
Cc:     Hyeonggon Yoo <42.hyeyoo@...il.com>, torvalds@...ux-foundation.org,
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Subject: Re: [PATCH RFC v6 00/21] DEPT(Dependency Tracker)

On Tue, 10 May 2022 08:38:38 +0900
Byungchul Park <byungchul.park@....com> wrote:

> Yes, I was talking about A and L'.
> 
> > detect that regardless of L. A nested lock associates the the nesting with  
> 
> When I checked Lockdep code, L' with depth n + 1 and L' with depth n
> have different classes in Lockdep.

If that's the case, then that's a bug in lockdep.

> 
> That's why I said Lockdep cannot detect it. By any chance, has it
> changed so as to consider this case? Or am I missing something?

No, it's not that lockdep cannot detect it, it should detect it. If it is
not detecting it, then we need to fix that.

-- Steve