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Re: [Xen-devel] Only 1 CPU was detected

  • To: Juergen Gross <jgross@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Hongjiang Zhang <honzhan@xxxxxxxxxxxxx>
  • Date: Thu, 28 Sep 2017 14:45:38 +0000
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  • Thread-topic: [Xen-devel] Only 1 CPU was detected

>> (XEN) ACPI Error (tbxfroot-0218): A valid RSDP was not found
>> [20070126]
>Uuh, that is rather bad, I guess.
>Just to be sure: can you please add "loglvl=all" to the xen boot parameters?
>This would need to be added in your grub config file just where "no-real-
>mode edd=off" is specified today (parameters for xen.gz).
>Then repost the "xl dmesg" output, please.
>Setting up a serial console would help, too, as you could then capture the
>output with enabled x2APIC, which might help to find the reason why Linux
>boot is hanging with this option.
>Additionally you should check whether you can update the BIOS of the test
>machine to a more recent version. It seems to be broken.
The dmesg with "loglvl=all" enable is attached. 
I have updated BIOS to the latest one when I first encountered this issue.
But it does not help. The issue is still there.

Setting up a serial console is helpful for diagnosing x2APIC hang issue.
But the test machine is a remote machine, I cannot access its physical COM port.


Attachment: xl_dmesg_logall.txt
Description: xl_dmesg_logall.txt

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