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Groups > linux.kernel > #1654014

Re: single-threaded wq lockdep is broken

From Johannes Berg <johannes@sipsolutions.net>
Newsgroups linux.kernel
Subject Re: single-threaded wq lockdep is broken
Date 2017-05-31 10:50 +0200
Message-ID <tN7ui-2qT-11@gated-at.bofh.it> (permalink)
References <tMccF-6e4-1@gated-at.bofh.it> <tN7kD-2mN-33@gated-at.bofh.it> <tN7kD-2mN-37@gated-at.bofh.it> <tN7kD-2mN-35@gated-at.bofh.it>
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On Wed, 2017-05-31 at 10:36 +0200, Johannes Berg wrote:
> 
> This was "ifndef", so it does in fact run here, just like you
> suggested. It doesn't warn though.

Also, even if DEADLOCK *is* defined, lockdep doesn't report anything.

johannes

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Thread

single-threaded wq lockdep is broken Johannes Berg <johannes@sipsolutions.net> - 2017-05-28 21:40 +0200
  Re: single-threaded wq lockdep is broken Lai Jiangshan <jiangshanlai@gmail.com> - 2017-05-31 10:40 +0200
    Re: single-threaded wq lockdep is broken Johannes Berg <johannes@sipsolutions.net> - 2017-05-31 10:40 +0200
      Re: single-threaded wq lockdep is broken Johannes Berg <johannes@sipsolutions.net> - 2017-05-31 10:50 +0200
      Re: single-threaded wq lockdep is broken Lai Jiangshan <jiangshanlai@gmail.com> - 2017-06-02 09:10 +0200
        Re: single-threaded wq lockdep is broken Johannes Berg <johannes@sipsolutions.net> - 2017-06-02 11:00 +0200
  Re: single-threaded wq lockdep is broken Tejun Heo <tj@kernel.org> - 2017-05-31 20:30 +0200
    Re: single-threaded wq lockdep is broken Johannes Berg <johannes@sipsolutions.net> - 2017-05-31 21:20 +0200

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