Comment 11 for bug 1022865

To @metta-crawler's solution: you don't have to turn to Debian for a fix. The next Ubuntu LTS (bionic) does include the updated atop version.

Adopting the same approach for Bionic ...
(Note: I use 400 for Bionic package priorities so a dependency missing from Xenial can be fetched from there)

$ cat /etc/apt/preferences.d/20_ubuntu-bionic.pref

Explanation: Bionic should be only a fallback in case something is not available from your primary repos
Package: *
Pin: release v=18.04,o=Ubuntu
Pin-Priority: 400

Explanation: Bionic should be only a fallback in case something is not available from your primary repos
Package: *
Pin: release v=18.04,o=Canonical
Pin-Priority: 400

Explanation: fix for atop crashes (https://bugs.launchpad.net/ubuntu/+source/atop/+bug/1022865)
Package: atop
Pin: release v=18.04,o=Ubuntu
Pin-Priority: 600

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$ cat /etc/apt/sources.list.d/ubuntu-bionic.list

# Bionic repos only for selected packages (see the respective file in /etc/apt/preferences.d)
deb http://archive.ubuntu.com/ubuntu bionic main restricted multiverse universe
deb-src http://archive.ubuntu.com/ubuntu bionic main restricted multiverse universe

deb http://archive.ubuntu.com/ubuntu/ bionic-updates main restricted multiverse universe
deb-src http://archive.ubuntu.com/ubuntu/ bionic-updates main restricted multiverse universe

deb http://security.ubuntu.com/ubuntu bionic-security main restricted multiverse universe
deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted multiverse universe

deb http://archive.canonical.com/ubuntu bionic partner
deb-src http://archive.canonical.com/ubuntu bionic partner