Hi bugs@,

I have a VMM host still running 7.8.

I had an existing 7.8 server (quite stock) that I upgraded with
sysupgrade. Unfortunately, it hangs and VMM's process for the upgraded VM
is at 100%.

Here's the serial console output:

SHA256.sig   100% |*************************************|  2144       00:00    
Signature Verified
BUILDINFO    100% |*************************************|    54       00:00    
Verifying old sets.
INSTALL.amd64 100% |************************************| 44889       00:00    
base79.tgz   100% |*************************************|   510 MB    00:51    
bsd          100% |*************************************| 32203 KB    00:02    
bsd.mp       100% |*************************************| 32331 KB    00:03    
bsd.rd       100% |*************************************|  4734 KB    00:00    
comp79.tgz   100% |*************************************| 88886 KB    00:06    
game79.tgz   100% |*************************************|  2742 KB    00:00    
man79.tgz    100% |*************************************|  8406 KB    00:00    
xbase79.tgz  100% |*************************************| 47835 KB    00:03    
xfont79.tgz  100% |*************************************| 23022 KB    00:01    
xserv79.tgz  100% |*************************************| 11815 KB    00:00    
xshare79.tgz 100% |*************************************|  4562 KB    00:00    
Verifying sets.
Fetching updated firmware.
fw_update: add none; update none; keep amd
Upgrading.
syncing disks... done
vmmci0: powerdown
rebooting...




Using drive 0, partition 3.
Loading......
probing: pc0 com0 mem[638K 766M a20=on] 
disk: hd0+
>> OpenBSD/amd64 BOOT 3.67
upgrade detected: switching to /bsd.upgrade
|
com0: 115200 baud
switching console to com0
>> OpenBSD/amd64 BOOT 3.67
boot> 
booting hd0a:/bsd.upgrade: 4264850+1827840+3892024+0+720896 
[109+484968+336166]=0xb00b80
entry point at 0xffffffff81001000
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.
Copyright (c) 1995-2026 OpenBSD. All rights reserved.  https://www.OpenBSD.org

OpenBSD 7.9 (RAMDISK_CD) #396: Wed May  6 13:25:05 MDT 2026
    [email protected]:/usr/src/sys/arch/amd64/compile/RAMDISK_CD
real mem = 788504576 (751MB)
avail mem = 758550528 (723MB)
random: good seed from bootblocks
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf2760 (10 entries)
bios0: vendor SeaBIOS version "1.16.3p0-OpenBSD-vmm" date 01/01/2011
bios0: OpenBSD VMM
acpi at bios0 not configured
cpu0 at mainbus0: (uniprocessor)
cpu0: AMD Opteron(tm) Processor 4162 EE, 25.23 MHz, 10-08-01
cpu0: cpuid 1 
edx=78ba97f<FPU,VME,DE,PSE,TSC,MSR,PAE,CX8,SEP,PGE,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2>
 ecx=80802001<SSE3,CX16,POPCNT,HV>
cpu0: cpuid 80000001 edx=e7d3fbff<NXE,MMXX,FFXSR,PAGE1GB,LONG,3DNOW2,3DNOW> 
ecx=837fb<LAHF,CMPLEG,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,NODEID>
cpu0: cpuid 80000007 edx=100<ITSC>
cpu0: 64KB 64b/line 2-way D-cache, 64KB 64b/line 2-way I-cache
cpu0: 512KB 64b/line 16-way L2 cache
cpu0: AMD erratum 721 detected and fixed
pvbus0 at mainbus0: KVM, OpenBSD
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "OpenBSD VMM Host" rev 0x00
virtio0 at pci0 dev 1 function 0 "Qumranet Virtio 1.x RNG" rev 0x01
viornd0 at virtio0
virtio0: irq 3
virtio1 at pci0 dev 2 function 0 "Qumranet Virtio 1.x Network" rev 0x01
vio0 at virtio1: 1 queue, address 00:55:01:00:00:01
virtio1: irq 5
virtio2 at pci0 dev 3 function 0 "Qumranet Virtio 1.x Storage" rev 0x01
vioblk0 at virtio2
virtio2: irq 6
scsibus0 at vioblk0: 1 targets
sd0 at scsibus0 targ 0 lun 0: <VirtIO, Block Device, >
sd0: 24576MB, 512 bytes/sector, 50331648 sectors
virtio3 at pci0 dev 4 function 0 "Qumranet Virtio 1.x SCSI" rev 0x01
vioscsi0 at virtio3: qsize 128
virtio3: irq 7
scsibus1 at vioscsi0: 1 targets
cd0 at scsibus1 targ 0 lun 0: <OpenBSD, VMM CD-ROM, 001> removable
virtio4 at pci0 dev 5 function 0 "OpenBSD VMM Control" rev 0x00
vmmci0 at virtio4
virtio4: irq 9
isa0 at mainbus0
com0 at isa0 port 0x3f8/8 irq 4: ns8250, no fifo
com0: console

(No output after this point.)


I also launched a fresh 7.9 install from ISO on the same host, and
it came up just fine.

I'm not sure where to begin debugging this. It seems like others will
likely run into it as well.

Thank you!

-Henrich

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