RE: [Xen-devel] Re: [patch 0/3]Enable CMCI (Corrected Machine Check Error Interrupt) for Intel CPUs

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

>-----Original Message-----
>From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx] 
>Sent: 2008年12月24日 16:02
>To: Jiang, Yunhong; Ke, Liping
>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-devel] Re: [patch 0/3]Enable CMCI (Corrected 
>Machine Check Error Interrupt) for Intel CPUs
>
>On 24/12/2008 02:57, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> 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()!

Yes, that's what I mean of "do similar thing in the cmci_cpu_down()". We placed 
it in stop_machine_run() because it has rendezvous all CPU already :$

>
> -- Keir
>
>
>

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