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Date: Mon, 24 Oct 2011 19:30:56 +0800 From: Yong Zhang <yong.zhang0@...il.com> To: Thomas Gleixner <tglx@...utronix.de> Cc: linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org Subject: Re: [RFC] [PATCH -rt 5/5] cpufreq: get rid of get_online_cpus()/put_online_cpus() On Mon, Oct 24, 2011 at 11:24:51AM +0200, Thomas Gleixner wrote: > > > 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. 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? Thanks, Yong -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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