runc/libcontainer/cgroups/systemd
vikaschoudhary16 d5b4a3eddb Fix race against systemd
- T0: runc triggers a systemd unit creation asynchronously from [here](https://github.com/opencontainers/runc/blob/master/libcontainer/cgroups/systemd/apply_systemd.go#L298)
- T1: runc then moves ahead and starts creating cgroup paths(.scope directories), [here](https://github.com/opencontainers/runc/blob/master/libcontainer/cgroups/systemd/apply_systemd.go#L348). Kernel creates .scope directory and cgroup.procs file(along with other default files) in the directory automatically, in an atomic manner.
- T3: systemd execution thread which was invoked at time `T0`, is still in the process of unit creation. systemd also trying to create cgroup paths and deletes the `.scope` directory which is created at time `T1` by runc from [here](https://github.com/systemd/systemd/blob/v219/src/shared/cgroup-util.c#L1630) in the code

Signed-off-by: vikaschoudhary16 <choudharyvikas16@gmail.com>
2018-01-08 09:37:26 -05:00
..
apply_nosystemd.go Disable systemd in static build 2017-09-11 18:38:22 +00:00
apply_systemd.go Fix race against systemd 2018-01-08 09:37:26 -05:00