Re: [Xen-devel] Xen 4.12.0-rc Hangs Around masked ExtINT on CPU#

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Thu, Mar 21, 2019 at 10:06:38AM -0700, John L. Poole wrote:
> Boot Hangs at: HVM: HAP page sizes: 4kB, 2MB or Adding cpu [INSERT 1-7] to
> runqueue 0
> 
> Log (preserved for 6 months at https://pastebin.com/BDPP7Pzk)
> 
> fs0:\efi\gentoo> man_xen.efiip startup.nsh, any other key to continue.
> Xen 4.12.0-rc (c/s Mon Feb 25 13:06:22 2019 +0000 git:f393b82fe5-dirty) EFI
> loader
> Using configuration file 'man_xen.cfg'
> xen-4.12.0-rc.gz: 0x000000005ad2b000-0x000000005ae49640
> 0x0000:0x02:0x00.0x0: ROM: 0x8000 bytes at 0x7c8bc028
>  Xen 4.12.0-rc
> (XEN) [00000024693d1c40] Xen version 4.12.0-rc (root@[unknown]) (gcc (Gentoo
> 8.2.0-r6 p1.7) 8.2.0) debug=y  Wed Mar 20 22:35:59 PDT 2019
> (XEN) [000000246afc47a8] Latest ChangeSet: Mon Feb 25 13:06:22 2019 +0000
> git:f393b82fe5-dirty
> (XEN) [000000246c2cdd38] Console output is synchronous.
> (XEN) [000000246ce239e0] Bootloader: EFI
> (XEN) [000000246d6f0cc8] Command line: console=vga,com1 com1=115200,8n1
> console_timestamps console_to_ring conring_size=64 log_buf_len=16M
> loglvl=all guest_loglvl=all sync_console=true sched_debug iommu=verbose
> apic_verbosity=debug efi=no-rs reboot=kbd

Could you try to add 'cpuinfo' to the Xen command line?

This should print some extra information when bringing up the APs.

Have you tried to see if the system boots reliably when no APs are
brought up by setting 'maxcpus=1' on the command line?

Have you tested if Xen can boot reliably on the box when using legacy
BIOS instead of UEFI?

Lastly you could also try to add the 'watchdog' option to the command
line? AFAICT the hang seems to happen before the watchdog is
enabled, but it's worth a try just in case.

Thanks, Roger.

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