From: Yong Zhang <yong.zhang0@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
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 19:56:24 +0800 [thread overview]
Message-ID: <20111024115624.GB2635@zhy> (raw)
In-Reply-To: <alpine.LFD.2.02.1110241343130.2633@ionos>
On Mon, Oct 24, 2011 at 01:45:16PM +0200, Thomas Gleixner wrote:
> On Mon, 24 Oct 2011, Yong Zhang wrote:
> > On Mon, Oct 24, 2011 at 11:24:51AM +0200, Thomas Gleixner wrote:
> > > > 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.
> >
> > If so, I think that kind of violation has been caught in mainline,
> > because mainline has had CPU_DOWN_PREPARE called under
> > cpu_hotplug.lock, right?
> >
> > Or am I missing something?
>
> Hmm, no. I obviously forgot that I moved it in RT :(
>
> So yes, it should be safe. Though the question is why cpufreq does not
> suffer from that that problem in mainline.
By this one: peter_zijlstra-fix-cpufreq.patch
Thanks,
Yong
prev parent reply other threads:[~2011-10-24 11:56 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
2011-10-24 11:30 ` Yong Zhang
2011-10-24 11:45 ` Thomas Gleixner
2011-10-24 11:56 ` Yong Zhang [this message]
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