On 6th May an update to selinux-policy for Fedora 32 (3.14.5-38.fc32)
caused all filesystems to be relabelled. In my case this took over
twelve hours. I was not happy.
It appears the developers have a workaround for the problem but the
update that applies it will cause all filesystems to be relabelled
if you already have the borked 3.14.5-38.fc32 update.
The new update is currently in updates-testing and will no doubt be
making its way onto our systems soon enough. The developers say:
Please note updating from the previous package version
selinux-policy-3.14.5-38.fc32 will have all filesystems relabeling
as a result which cannot be prevented. If relabeling takes a lot
of time, consider unmounting some filesystems, updating manually,
postponing the update to later.
You have been warned.