Re: [Xen-devel] [xen-4.13.0-rc] kexec/kdump failure with cpu Intel(R) Xeon(R) Gold 6242 CPU

[Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>]

Am Dienstag, 12. November 2019, 13:17:29 CET schrieb Andrew Cooper:
> 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?

Attached is the serial log from the boot.
If wanted I can add more debug flags.

> 
> 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.

There are also problems with kdump on native linux at least with the
vmlinuz-4.12.14 kernel from SLES12SP4.

Dietmar.

> 
> ~Andrew

Attachment: console-log.txt
Description: Text document

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