CentOS 7: df started to hang
Started having this issue on few servers after 7.5 upgrade. A quick reboot will fix the issue but I couldn't afford rebooting the production hosts, after hours of troubleshooting following fixed it for me.
systemctl restart proc-sys-fs-binfmt_misc.mount
i have the same issue on lots of servers
quick & dirty fix is
yum -y reinstall systemd