It seems that once this triggers the system is in an overall bad state.
I have seen
a) hang checks in dmesg
b) defunct processes even unrelated ones like
1 6 5529 4785 20 0 0 0 - Z+ pts/6 0:00
\_ [mandb] <defunct>
1 6 5530 4785 20 0 0 0 - Z+ pts/6 0:00
\_ [mandb] <defunct>
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https://bugs.launchpad.net/bugs/1836913
Title:
crash (on ppc64) hen restarting numad while huge guest is active
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