Hi Joey, On 05/25/2018 09:33 AM, joeyli wrote: > > Do you have good idea to inhibit the exit failure to avoid the subsequent > activity be blocked? > For the context the actual rule is: SUBSYSTEM=="memory", ACTION=="add", PROGRAM=="/usr/bin/systemd-detect-virt", RESULT!="zvm", ... You can use PROGRAM=="/bin/sh -c '/usr/bin/systemd-detect-virt || :'" so the exit status of systemd-detect-virt is explicitly ignored. I assume that if systemd-detect-virt fails then the value of RESULT will be the empty string (you should check).