Re: [PATCH v2] x86/mce: Don't participate in rendezvous process once nmi_shootdown_cpus() was made

From: Borislav Petkov
Date: Mon Feb 20 2017 - 15:28:12 EST

On Mon, Feb 20, 2017 at 09:29:24PM +0800, Xunlei Pang wrote:
> There is a small window between crash and kdump kernel boot, so
> if a SRAO comes within this window it will also cause the mce
> synchronization problem on the crashing cpu if we don't bail out the
> crashing cpu.

You mean, in the window between, kdump kernel starts writing out memory
and the second, kexec-ed kernel?

If so, please add that information to the place in do_machine_check()
where we check crashing_cpu so that we know why we're doing this
temporary ignore of #MC.



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