4f796c28d5
We already have a small regression test for #15226 within the swraid installer test. Unfortunately, we only check there whether the md kthread got signalled but not whether other rampaging processes are still alive that *should* have been killed. So in order to do this we provide multiple canary processes which are checked after the system has booted up: * canary1: It's a simple forking daemon which just sleeps until it's going to be killed. Of course we expect this process to not be alive anymore after boot up. * canary2: Similar to canary1, but tries to mimick a kthread to make sure that it's going to be properly killed at the end of stage 1. * canary3: Like canary2, but this time using a @ in front of its command name to actually prevent it from being killed. * kcanary: This one is a real kthread and it runs until killed, which shouldn't be the case. Tested with and without 67223ee and everything works as expected, at least on my machine. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
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