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Description of problem:
When working on https://bugzilla.redhat.com/show_bug.cgi?id=1776549, we noticed very poor performance of specific machinectl commands. Each of them takes 25 seconds. The nested podman or buildah commands provide almost immediate response, though.
Version-Release number of selected component (if applicable):
systemd-container-239-18.el8_1.4.x86_64 (suspected any version)
How reproducible:
100%
Steps to Reproduce:
1. Check real execution time of commands:
machinectl -q shell 1000@ /usr/bin/podman info
machinectl -q shell 1000@ /usr/bin/podman unshare cat /proc/self/uid_map
machinectl -q shell 1000@ /usr/bin/podman unshare cat /proc/self/gid_map
machinectl -q shell 1000@ /usr/bin/buildah info
machinectl -q shell 1000@ /usr/bin/buildah unshare cat /proc/self/uid_map
machinectl -q shell 1000@ /usr/bin/buildah unshare cat /proc/self/gid_map
Actual results:
Real time is always slightly above 25s.
Expected results:
Real time to be below 1s.
Additional info: