From: Thomas Gleixner <tglx@linutronix.de>
To: Yong Zhang <yong.zhang0@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org
Subject: Re: [RFC] [PATCH -rt 5/5] cpufreq: get rid of get_online_cpus()/put_online_cpus()
Date: Mon, 24 Oct 2011 11:24:51 +0200 (CEST) [thread overview]
Message-ID: <alpine.LFD.2.02.1110241123190.2642@ionos> (raw)
In-Reply-To: <20111024024416.GB24581@zhy>
On Mon, 24 Oct 2011, Yong Zhang wrote:
> On Wed, Oct 19, 2011 at 11:12:20AM +0200, Thomas Gleixner wrote:
> > On Sun, 16 Oct 2011, Yong Zhang wrote:
> >
> > > Fix below false positive (seems this is not a real deadlock scenario)
> > > lockdep warning:
> >
> > This looks like you caused it with patch 1.
>
> Hmmm, yup.
> CPU_DOWN_PREPARE will be under cpu_hotplug.lock.
>
> > Both need a bit more
> > thought, but thanks for catching that.
>
> No sure whether it's big issue or not.
> Mind showing more about your concern?
This is probably not the only place which will run into that issue and
I have not much interest to patch all those sites.
Thanks,
tglx
next prev parent reply other threads:[~2011-10-24 9:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-16 10:56 [RFC] [PATCH -rt 0/5] patchset focusing on cpu hotplug Yong Zhang
2011-10-16 10:56 ` [PATCH -rt 1/5] hotplug: sync_unplug: No '\n' in task name Yong Zhang
2011-10-16 10:56 ` [PATCH -rt 2/5] hotplug: Call cpu_unplug_begin() a little early Yong Zhang
2011-10-16 10:56 ` [RFC] [PATCH -rt 3/5] printk: don't call printk_tick in printk_needs_cpu() Yong Zhang
2011-10-16 10:56 ` [PATCH -rt 4/5] workqueue: hotplug fix Yong Zhang
2011-10-19 7:14 ` Thomas Gleixner
2011-10-24 2:26 ` Yong Zhang
2011-10-24 9:25 ` Thomas Gleixner
2011-10-16 10:56 ` [RFC] [PATCH -rt 5/5] cpufreq: get rid of get_online_cpus()/put_online_cpus() Yong Zhang
2011-10-19 9:12 ` Thomas Gleixner
2011-10-24 2:44 ` Yong Zhang
2011-10-24 9:24 ` Thomas Gleixner [this message]
2011-10-24 11:30 ` Yong Zhang
2011-10-24 11:45 ` Thomas Gleixner
2011-10-24 11:56 ` Yong Zhang
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