UML requires RB_POWER_OFF rather than RB_AUTOBOOT (Qemu) in order to avoid a kernel panic from killing init. --- tools/runner.py | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/tools/runner.py b/tools/runner.py index 33c10917..5b6b0820 100644 --- a/tools/runner.py +++ b/tools/runner.py @@ -479,10 +479,8 @@ class QemuRunner(RunnerAbstract): def stop(self): RB_AUTOBOOT = 0x01234567 # - # Calling 'reboot' or 'shutdown' from a shell (e.g. os.system('reboot')) - # is not the same the POSIX reboot() and will cause a kernel panic since - # we are the init process. The libc.reboot() allows the VM to exit - # gracefully. + # Killing init() results in a kernel panic. For QEMU a graceful + # exit is achieved with RB_AUTOBOOT # libc.reboot(RB_AUTOBOOT) @@ -511,3 +509,11 @@ class UmlRunner(RunnerAbstract): self._prepare_mounts() super().prepare_environment() + + def stop(self): + RB_POWER_OFF = 0x4321fedc + # + # Killing init() results in a kernel panic. For UML a graceful + # exit is achieved with RB_POWER_OFF + # + libc.reboot(RB_POWER_OFF) -- 2.34.1