From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: Re: [patch 0/3]Enable CMCI (Corrected Machine Check
	Error Interrupt) for Intel CPUs
Date: Wed, 24 Dec 2008 08:01:39 +0000
Message-ID: <C5779CE3.20892%keir.fraser@eu.citrix.com>
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To: "Jiang, Yunhong" <yunhong.jiang@intel.com>, "Ke, Liping" <liping.ke@intel.com>
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On 24/12/2008 02:57, "Jiang, Yunhong" <yunhong.jiang@intel.com> wrote:

> As for your proposal of do it before the stop_machine_run(), it may reduce the
> window, but still can't eliminate the window of lost CMCI interrupt, unless we
> do similar thing in the cmci_cpu_down() (i.e. all CPU is irq_disabled before
> update the CMCI status). It is the same if we pull the notifier chain to Xen.
> How is your idea?

You only need hardirqs disabled, so rendezvous within an on_each_cpu()
callback is sufficient for you. You don't need to get intimate with
stop_machine_run()!

 -- Keir