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Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly fair lock

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly fair lock
Date 2017-02-08 10:50 +0100
Message-ID <t8x2X-74c-21@gated-at.bofh.it> (permalink)
References <t6qoW-58b-17@gated-at.bofh.it> <t89Dk-vJ-19@gated-at.bofh.it> <t8azn-16x-11@gated-at.bofh.it> <t8jW2-74w-39@gated-at.bofh.it> <t8k5J-78e-41@gated-at.bofh.it>
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On Tue, Feb 07, 2017 at 11:53:08AM -0800, Paul E. McKenney wrote:
> My usual question is "how often does the spinlock_debug code find a
> problem that would be hard to find otherwise?"  Probably unanswerable
> given the nature of Linux-kernel development, but I figured I would ask
> anyway.  ;-)

So I've not found it useful in many years, and quite to the contrary,
its proven prone to generate false positives because the lock timeout
gets hit because of various reasons.

But that's just me of course..

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Thread

[PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly fair lock Waiman Long <longman@redhat.com> - 2017-02-02 15:20 +0100
  Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly  fair lock Peter Zijlstra <peterz@infradead.org> - 2017-02-07 09:50 +0100
    Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly  fair lock Ingo Molnar <mingo@kernel.org> - 2017-02-07 10:50 +0100
      Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly fair  lock Waiman Long <longman@redhat.com> - 2017-02-07 20:50 +0100
        Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly  fair lock "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-02-07 21:00 +0100
          Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly  fair lock Peter Zijlstra <peterz@infradead.org> - 2017-02-08 10:50 +0100
            Re: [PATCH v3 0/3] locking/spinlock_debug: Change it to a mostly  fair lock "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-02-08 14:20 +0100

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