[Xen-devel] Only 1 CPU was detected

[Hongjiang Zhang <honzhan@xxxxxxxxxxxxx>]

Hi all,

 

I install Xen 4.8 on Ubuntu 17.04 (kernel is updated to 4.12). But I found only 1 CPU was detected.

 

I thought it is caused by some BIOS settings, so I enabled x2APIC in BIOS, unfortunately, Linux hangs during booting after printing “Loading initial ramdisk …”.

 

I have to disable x2APIC finally, but I only have 1 CPU when system is up. Does anyone encounter this issue?

 

The whole dmesg was attached. Xen related output.

 

[    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable

[    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved

[    0.000000] Xen: [mem 0x0000000000100000-0x000000007a088fff] usable

[    0.000000] Xen: [mem 0x000000007a089000-0x000000007a188fff] reserved

[    0.000000] Xen: [mem 0x000000007a189000-0x000000007a288fff] type 20

[    0.000000] Xen: [mem 0x000000007a289000-0x000000007af0afff] reserved

[    0.000000] Xen: [mem 0x000000007af0b000-0x000000007b93afff] ACPI NVS

[    0.000000] Xen: [mem 0x000000007b93b000-0x000000007bab4fff] ACPI data

[    0.000000] Xen: [mem 0x000000007bab5000-0x000000007bae8fff] usable

[    0.000000] Xen: [mem 0x000000007bae9000-0x000000007bafefff] ACPI data

[    0.000000] Xen: [mem 0x000000007baff000-0x000000007bafffff] usable

[    0.000000] Xen: [mem 0x0000000080000000-0x000000008fffffff] reserved

[    0.000000] Xen: [mem 0x00000000feda8000-0x00000000fedabfff] reserved

[    0.000000] Xen: [mem 0x00000000fee00000-0x00000000feefffff] reserved

[    0.000000] Xen: [mem 0x00000000ff310000-0x00000000ffffffff] reserved

[    0.000000] Xen: [mem 0x0000000100000000-0x000000187fffffff] usable

[    0.000000] Hypervisor detected: Xen PV

[    0.000000] Booting paravirtualized kernel on Xen

[    0.000000] Xen version: 4.8.0 (preserve-AD)

[    0.000000] xen: PV spinlocks enabled

[    0.004000] xen:events: Using FIFO-based ABI

[    0.004000] clocksource: xen: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns

[    0.004000] Xen: using vcpuop timer interface

[    0.004000] installing Xen timer for CPU 0

[    0.103141] xen:grant_table: Grant tables using version 1 layout

[    0.105359] xen:balloon: Initialising balloon driver

[    0.118198] xen_balloon: Initialising balloon driver

[    0.169556] clocksource: Switched to clocksource xen

[    0.914651]  xen_acpi_processor_init+0x5f/0x1f6

[    0.965809] xen_netfront: Initialising Xen virtual ethernet driver

[    2.011142] genirq: Flags mismatch irq 8. 00000080 (rtc0) vs. 00000000 (xen-pcpu)

[    6.722743] systemd[1]: Detected virtualization xen.

[   21.072897] xen:xen_evtchn: Event-channel device installed

[   21.204752] xen:manage: Unable to read sysrq code in control/sysrq

 

Thanks

Hongjiang Zhang

 

 

 

Attachment: dmesg.log
Description: dmesg.log

Attachment: lscpu.log
Description: lscpu.log

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