How to enable systemd support

问题

I have built a system with Yocto 2.4.2 supporting systemd. But there are some issues seemed to be missed in my configurations leading to failure of kernel starting. Any one can help ?

  DISTRO_FEATURES_append = " systemd"
  VIRTUAL-RUNTIME_init_manager = "systemd"

回答1:

systemd and cgroup should be enabled together

• systemd manager (local.conf)

  DISTRO_FEATURES_append = " systemd"

  VIRTUAL-RUNTIME_init_manager = "systemd"

• For systemd handler (defconfig)

  CONFIG_FHANDLE=y #for systemd

• cgroups is required by systemd (defconfig)

  CONFIG_CGROUPS=y

  CONFIG_CGROUP_FREEZER=y

  CONFIG_CGROUP_PIDS=y

  CONFIG_CGROUP_DEVICE=y

  CONFIG_CPUSETS=y

  CONFIG_PROC_PID_CPUSET=y

  CONFIG_CGROUP_CPUACCT=y

  CONFIG_PAGE_COUNTER=y

  CONFIG_MEMCG=y

  CONFIG_CGROUP_SCHED=y

  CONFIG_NAMESPACES=y

  CONFIG_OVERLAY_FS=y

回答2:

I had to enable cgroups in defconfig :)

来源：https://stackoverflow.com/questions/50903680/how-to-enable-systemd-support