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Re: [Xen-devel] xen 4.13 + kernel 5.4.11 'APIC Error ... FATAL PAGE FAULT' on reboot? non-Xen reboot's ok.


  • To: <pgnet.dev@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Wed, 15 Jan 2020 17:21:11 +0000
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  • Delivery-date: Wed, 15 Jan 2020 17:21:49 +0000
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On 15/01/2020 17:19, PGNet Dev wrote:
> hi
>
> On 1/15/20 9:10 AM, Andrew Cooper wrote:
>>> Is this a known/fixable issue?
>> The APIC errors aren't fatal.  They need looking into and addressing in
>> due course.
>>
>> The real crash is EFI firmware falling over a NULL pointer which is
>> wildly known issue.  Fixing it requires following the Linux approach
>> which is to not use EFI reboot unless absolutely necessary.
>>
>> You can work around it with reboot=a on the command line, but actually
>> fixing this in Xen is probably never going to happen because I've lost
>> interest in trying to arguing that default behaviour like the above is a
>> bad thing which we should code around.
> currently, here,
>
> cat /proc/cmdline
>       root=/dev/mapper/VG0-ROOT softlevel=xen rd.shell mds=full l1tf=flush 
> rd.debug=0 rd.udev.log_priority=debug rd.auto=1 dolvm 
> lvmwait=/dev/mapper/VG0-ROOT root=/dev/mapper/VG0-ROOT rootfstype=ext4 
> rootflags=journal_checksum noresume nomodeset nouveau.modeset=1 
> video=vesa:off video=efifb:1024x768 xencons=xvc console=tty0 console=hvc0 
> pcie_aspm=off mce=off fsck.mode=skip fsck.repair=preen reboot=acpi 
> clocksource=xen intel_iommu=on apparmor=0 plymouth.enable=0 
> scsi_mod.use_blk_mq=1 elevator=mq-deadline cpuidle cpufreq=xen:ondemand 
> net.ifnames=1 biosdevname=0 showopts noquiet log_buf_len=10M 
> print_fatal_signals=1 systemd.log_level=info systemd.log_target=kmsg 
> earlyprintk=xen,keep audit=0
>
> note the
>
>       reboot=acpi
>
> already there.
>
> something else I'm missing, perhaps?

That is the command line for dom0 which is a VM.  You need the Xen
hypervisor command line.

You'll need to edit xen-4.13.0_04-lp151.688.cfg which will be somewhere
on the ESP (wherever that is mounted in an openSUSE system).

~Andrew

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