From: Mike Galbraith <efault@gmx.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: RT <linux-rt-users@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [RT] lockdep munching nr_list_entries like popcorn
Date: Thu, 16 Feb 2017 09:50:00 +0100 [thread overview]
Message-ID: <1487235000.5258.48.camel@gmx.de> (raw)
In-Reply-To: <alpine.DEB.2.20.1702160933420.3543@nanos>
On Thu, 2017-02-16 at 09:37 +0100, Thomas Gleixner wrote:
> On Thu, 16 Feb 2017, Mike Galbraith wrote:
>
...
> > swapvec_lock? Oodles of 'em? Nope.
>
> Well, it's a per cpu lock and the lru_cache_add() variants might be called
> from a gazillion of different call chains, but yes, it does not make a lot
> of sense. We'll have a look.
Adding explicit local_irq_lock_init() makes things heaps better, so
presumably we need better lockdep-foo in DEFINE_LOCAL_IRQ_LOCK().
-Mike
next prev parent reply other threads:[~2017-02-16 8:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-16 6:03 [RT] lockdep munching nr_list_entries like popcorn Mike Galbraith
2017-02-16 8:37 ` Thomas Gleixner
2017-02-16 8:50 ` Mike Galbraith [this message]
2017-02-16 9:01 ` Thomas Gleixner
2017-02-16 9:27 ` Mike Galbraith
2017-02-16 11:06 ` Peter Zijlstra
2017-02-16 14:42 ` Mike Galbraith
2017-02-16 14:53 ` Sebastian Andrzej Siewior
2017-02-16 18:06 ` Mike Galbraith
2017-02-16 18:16 ` Mike Galbraith
2017-02-17 20:55 ` Mike Galbraith
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