How to migrate from ext4 to btrfs?

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waltaki2020-04-19 19:27:18

Debian

waltaki, 2020-04-19 19:27:18

You need to change the file system from ext4 to btrfs, on the mounted / dev / vda1 in /

When trying to unmount, it says:

umount: /: target is busy
        (In some cases useful info about processes that
         use the device is found by lsof(8) or fuser(1).)

This is logical, but I'm on a kvm virtual machine, and if I kill all these processes, then I will probably be thrown out of the session.

How to do it right?

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