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

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

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()!

 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel