title: problems during linux kernel init
body: <p>What are the possible culprits for crashes during kernel init? </p>
  
  <p>I am running a kernel that has initramfs, the inittab is very basic rcS (as sysinit) and getty (respawn). While booting I don't get any error message, however the init gives me this message:
  S0 respawning too fast: disabled for 5 minutes, where S0 is actually the respawn::getty line(it seems as getty keep crashing), also none of the messages generated by the rcS are seen on the console (I assume that rcS commands also crashe). </p>
  
  <p>If I force the kernel to go to /bin/sh (instead of /init) I can call rcS manually and I get no errors, same happens for getty (if I call getty with the same params from inittab it works fine). </p>
  
  <p>I am wondering what are the difference between the way init spawns processes and the way /bin/sh does.</p>