Does Linux still support UP?

[Chris Rankin]

Hi,

I have an ancient i586 UP machine that happily runs vanilla Linux
6.4.16, but which locks up shortly after booting vanilla 6.5.0. The
kernel *seems* to run into trouble as soon as the networking layer
becomes busy. However, its SysRq-S/U/B sequence still seems to work as
expected and so obviously *something* is still responding somewhere.

This problem still exists in vanilla 6.6.8.

FWIW I have raised this bug in bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=218296

Thanks for any help here,
Cheers,
Chris