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Date: Thu, 15 Nov 2012 16:33:44 +0100
Message-ID: <CAFTL4hzox08W_Uz6BP=7vM4Vq1ezHW0kMYG5br8fYAZ6E08Vig@mail.gmail.com>
Subject: Re: [PATCH 7/7] printk: Wake up klogd using irq_work
From: Frederic Weisbecker <fweisbec@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Paul Gortmaker <paul.gortmaker@windriver.com>
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2012/11/15 Frederic Weisbecker <fweisbec@gmail.com>:
> ----->
> CPU that offilines                                          CPU offlining
> -----------------
> ---------------------
> cpu_down() {
>     __stop_machine(take_cpu_down)
>
> take_cpu_down() {
>
> __cpu_disable() {
>
>     * disable irqs in hw
>
>     * clear from online mask
>                                                                        }
>
> move all tasks somewhere
>                                                                    }
> while (!idle_cpu(offlining))
>     cpu_relax()
>
> cpu_die();
> <---------

Oh thanks gmail for the mess. Sometimes it mangles contents, sometimes
not. Probably depend if the moon is odd or even.

Here is a pastebin: http://pastebin.com/aACvyu6p
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