>From here I was switching to qemu 6.0 on the bare metal machine.
6.0-KVM - works
6.0-TCG - works

But running the testsuite itself fails (due to using only 512M ram).
I found that switching from testsuite-08 to testsuite-09 allowed me to get into 
bad-mode in TCG (with enough memory, but into the segfaulting rm).

Now that (segfaulting 6.0 with TCG) I switched to KVM and it worked.

TL;DR for now:
- memory problems hit the same that are segfaulting
- segfault not reproducible in KVM, TCG only and qemu 6.0 only

P.S. I do all the creation of the images and such with the working qemu
5.2, only then do I switch to 6.0 and re-run the failing test.

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Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1935617

Title:
  systemd autopkgtest broken on ppc64el with qemu 6.0

Status in qemu package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  I'm not sure yet if this is flaky or a real issue, but I'm filing it
  to avoid multiple people analyzing the same.

  The Qemu 6.0 upload 
https://launchpad.net/ubuntu/+source/qemu/1:6.0+dfsg-1~ubuntu2 triggers a test 
failure like
  
https://autopkgtest.ubuntu.com/results/autopkgtest-impish/impish/ppc64el/s/systemd/20210708_223311_e3bbb@/log.gz

  I have tested the new qemu on ppc64 and it worked fine for device emulation 
and migration cases.
  But this is suspicious.
  Of the last tests exactly and only those with the new qemu failed.

  
  impish
    ppc64el
      tests-in-lxd                   (F  5% f  0% S  0% B  0% => P 95%/) 
F.........F.............................
      systemd-fsckd                  (F  0% f  0% S 100% B  0% => P  0%/) 
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
      upstream-1                     (F 15% f  0% S  0% B  0% => P 85%/) 
F..FFFF....F............................
      upstream-2                     (F 12% f  0% S  0% B  0% => P 87%/) 
F..FFFF.................................

  
  For an insight in flakyness/reproducibility I've retriggered the missing qemu 
and the non-qemu cases a few times. If those reproduce all-bad vs all-good 
again this would further indicate a real issue.

  Unfortunately the ppc maas seems down right now and canonistack also
  isn't too nice this week - overall that inhibits the testing a bit :-/

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