During reboot or kexec, watchdog will be setup before systemd is replaced by systemd-shutdown binary. But while systemd-shutdown is executed, the watchdog will not really be released. Log shown as following: [ 39.371202] watchdog: watchdog0: watchdog did not stop! [ 39.383659] systemd-shutdown[1]: Syncing filesystems and block devices. [ 39.423727] systemd-shutdown[1]: Sending SIGTERM to remaining processes... [ 39.440857] systemd-journald[526]: Received SIGTERM from PID 1 (systemd-shutdow). [ 39.461047] systemd-shutdown[1]: Sending SIGKILL to remaining processes... [ 39.466736] systemd-shutdown[1]: Using hardware watchdog 'iTCO_wdt', version 0, device /dev/watchdog [ 39.467835] systemd-shutdown[1]: Unmounting file systems. [ 39.469721] [2171]: Remounting '/' read-only in with options 'attr2,inode64,logbufs=8,logbsize=32k,noquota'. [ 39.550266] systemd-shutdown[1]: All filesystems unmounted. [ 39.550274] systemd-shutdown[1]: Deactivating swaps. [ 39.550443] systemd-shutdown[1]: All swaps deactivated. [ 39.550449] systemd-shutdown[1]: Detaching loop devices. [ 39.550697] systemd-shutdown[1]: All loop devices detached. [ 39.550703] systemd-shutdown[1]: Detaching DM devices. [ 39.551269] systemd-shutdown[1]: Not all DM devices detached, 1 left. [ 39.551277] systemd-shutdown[1]: Cannot finalize remaining DM devices, continuing. [ 39.580044] systemd-shutdown[1]: Successfully changed into root pivot. [ 39.580050] systemd-shutdown[1]: Returning to initrd... [ 39.587921] watchdog: watchdog0: watchdog did not stop! [ 39.774130] dracut Warning: Break before pre-shutdown after applying fix [ 59.520379] watchdog: watchdog0: watchdog did not stop! [ 59.542286] systemd-shutdown[1]: Syncing filesystems and block devices. [ 59.583313] systemd-shutdown[1]: Sending SIGTERM to remaining processes... [ 59.600133] systemd-journald[517]: Received SIGTERM from PID 1 (systemd-shutdow). [ 59.624435] systemd-shutdown[1]: Sending SIGKILL to remaining processes... [ 59.629288] systemd-shutdown[1]: Using hardware watchdog 'iTCO_wdt', version 0, device /dev/watchdog [ 59.630468] systemd-shutdown[1]: Unmounting file systems. [ 59.632219] [2172]: Remounting '/' read-only in with options 'attr2,inode64,logbufs=8,logbsize=32k,noquota'. [ 59.727588] systemd-shutdown[1]: All filesystems unmounted. [ 59.727596] systemd-shutdown[1]: Deactivating swaps. [ 59.727719] systemd-shutdown[1]: All swaps deactivated. [ 59.727725] systemd-shutdown[1]: Detaching loop devices. [ 59.727974] systemd-shutdown[1]: All loop devices detached. [ 59.727979] systemd-shutdown[1]: Detaching DM devices. [ 59.728547] systemd-shutdown[1]: Not all DM devices detached, 1 left. [ 59.728556] systemd-shutdown[1]: Cannot finalize remaining DM devices, continuing. [ 59.758160] systemd-shutdown[1]: Successfully changed into root pivot. [ 59.758167] systemd-shutdown[1]: Returning to initrd... [ 59.950305] dracut Warning: Break before pre-shutdown
System and Service Manager
Details
Most documentation is available on systemd's web site.
Assorted, older, general information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the Code Map for information about this repository's layout and content.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list or join our IRC channel.
Stable branches with backported patches are available in the stable repo.
