From: Ingo Molnar <mingo@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>, Ingo Molnar <mingo@redhat.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 4/5] locking/lockdep: Make class->ops a percpu counter
Date: Tue, 2 Oct 2018 20:53:53 +0200 [thread overview]
Message-ID: <20181002185353.GA36596@gmail.com> (raw)
In-Reply-To: <20181002142809.GH26858@hirez.programming.kicks-ass.net>
* Peter Zijlstra <peterz@infradead.org> wrote:
> On Tue, Oct 02, 2018 at 10:10:48AM -0400, Waiman Long wrote:
> > One alternative is to group it under CONFIG_DEBUG_LOCKDEP again. This
> > metric was originally under CONFIG_DEBUG_LOCKDEP, but was moved to
> > CONFIG_LOCKDEP when trying to make other lock debugging statistics
> > per-cpu counters. It was probably because this metric is per lock class
> > while the rests are global.
> >
> > By doing so, you incur the memory cost only when CONFIG_DEBUG_LOCKDEP is
> > defined.
> >
> > What do you think?
>
> Works for me.
Sounds good to me too!
Thanks,
Ingo
next prev parent reply other threads:[~2018-10-02 18:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-28 17:53 [PATCH 0/5] locking/lockdep: Improve lockdep performance Waiman Long
2018-09-28 17:53 ` [PATCH 1/5] locking/lockdep: Remove add_chain_cache_classes() Waiman Long
2018-09-28 17:53 ` [PATCH 2/5] locking/lockdep: Eliminate redundant irqs check in __lock_acquire() Waiman Long
2018-10-02 9:06 ` Ingo Molnar
2018-09-28 17:53 ` [PATCH 3/5] locking/lockdep: Add a faster path in __lock_release() Waiman Long
2018-10-02 9:03 ` Ingo Molnar
2018-09-28 17:53 ` [PATCH 4/5] locking/lockdep: Make class->ops a percpu counter Waiman Long
2018-09-28 20:25 ` kbuild test robot
2018-09-28 20:31 ` Waiman Long
2018-09-28 20:42 ` kbuild test robot
2018-10-02 9:39 ` Peter Zijlstra
2018-10-02 9:55 ` Ingo Molnar
2018-10-02 14:10 ` Waiman Long
2018-10-02 14:28 ` Peter Zijlstra
2018-10-02 18:53 ` Ingo Molnar [this message]
2018-09-28 17:53 ` [PATCH 5/5] locking/lockdep: Call lock_release after releasing the lock Waiman Long
2018-10-02 9:08 ` Ingo Molnar
2018-10-02 9:06 ` [PATCH 0/5] locking/lockdep: Improve lockdep performance Ingo Molnar
2018-10-02 13:57 ` Waiman Long
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