On Sat, Dec 1, 2012 at 4:20 PM, <[email protected]> wrote: > How does systemd kill the running processes at shutdown?
On Sat, Dec 1, 2012 at 6:59 PM, Reindl Harald <[email protected]> wrote: > > Am 01.12.2012 16:20, schrieb [email protected]: >> How does systemd kill the running processes at shutdown? >> (I tried asking at fedoraforum.org first, but got no responses there.) >> >> Presumably it tries to gracefully stop all services. Is every process part >> of a service? > > finally each process get a SIGTERM and any proper written process > wil cleanup anything he has to do and quit gracefully, this is the > way unix works For details about how remaining processes in a service is killed see systemd.kill(5) [0]. Any processes still alive after all services have been terminated are killed (in a loop) with SIGTERM/SIGKILL by systemd-shutdown [1](at the same time remaining devices/filesystems are unmounted and disassembled). If your initramfs supports it [2], systemd will then pivot away from your root partition, back into your initramfs which will again try to kill remaining processes and unomunt remaining filesystems. Then we give up \o/ > Presumably it tries to gracefully stop all services. Is every process part of > a service? Not necessarily (but you need to make an effort to create an exception). > When it stops a service, it presumably runs the ExecStop of that service, but > what if the service doesn't exit immediately? How long does systemd wait? See systemd.service(5) [3], in particular TimeoutStopSec=. HTH, Tom [0]: <http://www.freedesktop.org/software/systemd/man/systemd.kill.html> [1]: <http://cgit.freedesktop.org/systemd/systemd/tree/src/core/shutdown.c> [2]: <http://www.freedesktop.org/wiki/Software/systemd/InitrdInterface> [3]: <http://www.freedesktop.org/software/systemd/man/systemd.service.html> _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
