[Xen-users] Boot Sometimes Hangs At "masked EXTINT" (Varies)

["John L. Poole" <jlpoole56@xxxxxxxxx>]

I finally got a serial port working to capture problems with a xen 
startup.  (Details in a posting
which I create after this.)

I have found I am having mixed results booting xen, sometimes it works, 
other times
the boot process gets hung at a "masked ExtINT" stage.  I ran xen on 
this server for 2 years
using a method of launching and EFI file in conjunction with a 
configuration file.  I've
wanted to have xen work with grub so I did not have to manually nurse 
each start-up.
It seems like if I select the edit mode in Grub2 of the Xen entry and 
then launch
using control-x from within the editing session where I have not made 
any changes,
I have a better chance of the boot process working.  Now it could be that
something is failing with the serial console; however, I have noticed that
when I click the reset button on the panel, a very short click simply 
turns off
the server.  Normally, when the server is running and I have to turn it 
off, I have
to hold the reset button down several seconds to cause power to go off.
This suggests that the hanging
session with the last posted message of "masked ExtINT[number varies]" 
is, indeed,
the last event.

The boot ends up hanging at "masked ExtINT on CPU#2" or on "CPU#4" or 
"CPU#6".
My next step is to try the latest version of xen and xen-tools, though 
Gentoo has
that version flagged and I have to determine what the flagging is for:

https://packages.gentoo.org/packages/app-emulation/xen-tools

Here the tail of the boot log to the point of stopping:

...
(XEN) [2019-03-03 22:59:59] HVM: ASIDs enabled.
(XEN) [2019-03-03 22:59:59] HVM: VMX enabled
(XEN) [2019-03-03 22:59:59] HVM: Hardware Assisted Paging (HAP) detected
(XEN) [2019-03-03 22:59:59] HVM: HAP page sizes: 4kB, 2MB
(XEN) [2019-03-03 22:59:55] masked ExtINT on CPU#1
(XEN) [2019-03-03 22:59:55] masked ExtINT on CPU#2

Any thoughts or flags I should use to further capture what is happening?

Thank you,

John

-----------------------------------------------------------------------------------

The full log of the boot session from the point of selection in Grub2 is at:
https://pastebin.com/zsZrXhgJ


A log of a successful boot into a regular Linux session (non-Xen) is at:
https://pastebin.com/ZQ55wvaW

================== SOFTWARE ============================
Gentoo Linux:
# uname -a
Linux zeta 4.19.23-gentoo #7 SMP Sat Mar 2 20:42:00 PST 2019 x86_64 
Intel(R) Atom(TM) CPU C2750 @ 2.40GHz GenuineIntel GNU/Linux
#

Kernel configuration (201903031742.config):

     https://pastebin.com/bBUAmcqG


installed Xen 4.11.1:
# eix -I xen
[I] app-emulation/xen
     Available versions:  4.10.2-r2^st (~)4.10.3^st (~)4.11.1^st 
**4.12.0_rc2^st {custom-cflags debug efi flask}
     Installed versions:  4.11.1^st(09:56:57 PM 03/02/2019)(efi flask 
-custom-cflags -debug)
     Homepage:            https://www.xenproject.org
     Description:         The Xen virtual machine monitor

[I] app-emulation/xen-tools
     Available versions:  4.10.2-r1(0/4.10)^t ~4.10.3(0/4.10)^t 
(~)4.11.1(0/4.11)^t **4.12.0_rc2(0/4.12)^t {api custom-cflags debug doc 
flask hvm ocaml ovmf +pam pygrub python +qemu +qemu-traditional screen 
sdl static-libs system-qemu system-seabios PYTHON_TARGETS="python2_7"}
     Installed versions:  4.11.1(0/4.11)^t(09:53:47 PM 
03/02/2019)(flask hvm ovmf pam qemu qemu-traditional screen sdl -api 
-custom-cflags -debug -doc -ocaml -pygrub -python -static-libs 
-system-qemu -system-seabios PYTHON_TARGETS="python2_7")
     Homepage:            https://www.xenproject.org
     Description:         Xen tools including QEMU and xl

Found 2 matches
 #

 Emerge log of xen-tools install:

    https://pastebin.com/yffT0gNb

 Emerge log of xen install:

    https://pastebin.com/Ygaefaf6

 # eix -I grub
[I] sys-boot/grub
     Available versions:  (2) 2.02-r1(2/2.02-r1)^st 
~2.02-r2(2/2.02-r2)^st ~2.02-r3(2/2.02-r3)^st **9999(2/9999)^st
       {debug device-mapper doc efiemu +fonts libzfs mount multislot 
nls sdl static test +themes truetype GRUB_PLATFORMS="coreboot efi-32 
efi-64 emu ieee1275 loongson multiboot pc qemu qemu-mips uboot xen xen-32"}
     Installed versions:  2.02-r1(2/2.02-r1)^st(11:16:22 PM 
03/02/2019)(fonts nls themes -debug -device-mapper -doc -efiemu -libzfs 
-mount -multislot -sdl -static -test -truetype GRUB_PLATFORMS="efi-64 pc 
xen -coreboot -efi-32 -emu -ieee1275 -loongson -multiboot -qemu 
-qemu-mips -uboot -xen-32")
     Homepage:            https://www.gnu.org/software/grub/
     Description:         GNU GRUB boot loader

 #

================== HARDWARE =======================
Motherboard: Supermicro A1SAi-2750F

Processor/Cache:
CPU Intel® Atom™ Processor C2750
CPU TDP 20W (8-Core)
FCBGA 1283
System-on-Chip

Memory Capacity:
4x 204-pin DDR3 SO-DIMM socket
Supports up to 64GB DDR3 ECC Un-Buffered memory
Memory Type
1600/1333MHz ECC DDR3 SDRAM, 204-pin gold-plated DIMMs
DIMM Sizes 16GB, 8GB, 4GB, 2GB
Memory Voltage 1.5 V, 1.35

System BIOS Type 64Mb SPI Flash EEPROM with AMI UEFI

BIOS Features:
Plug and Play (PnP)
DMI 2.3
ACPI 5.0
USB Keyboard support
SMBIOS 2.7.1
UEFI

--
Email Rider

John Laurence Poole
Salem OR 97301-4241
707-812-1323 office


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