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Re: [Xen-devel] [xen-4.13.0-rc] kexec/kdump failure with cpu Intel(R) Xeon(R) Gold 6242 CPU
- To: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Tue, 12 Nov 2019 12:17:29 +0000
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- Delivery-date: Tue, 12 Nov 2019 12:17:54 +0000
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On 12/11/2019 11:38, Dietmar Hahn wrote:
> Hi,
>
> on a new machine with cpu Intel(R) Xeon(R) Gold 6242 CPU the kexec/kdump
> doesn't work with current xen-4.13.0-rc.
> The last output of the xen console is:
>
> (XEN) Hardware Dom0 crashed: Executing kexec image on cpu5
> (XEN) Shot down all CPUs
>
> After short delay the system reboots.
>
> It seems the fixes mentioned in the thread
> https://lists.xenproject.org/archives/html/xen-devel/2019-10/msg01948.html
> aren't enough.
>
> I built xen-4.11 with the patches but no success.
> On an older system with xen-4.4 the kdump works.
>
> Any help is appreciated.
Do you have purgatory serial enabled?
By any chance does Xen revert back to xAPIC mode and Linux configure
x2apic mode? There are some interrupt routing issues on those CPUs with
mismatched x(2)apic settings.
~Andrew
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