On 12.11.2015 07:12, Slawa Olhovchenkov wrote: > I have amd64, STABLE r288167. > PID TID COMM TDNAME CPU PRI STATE WCHAN > kill -STOP don't have effect. > gdb can't be attached. That is expected, STOP-ed process cannot do anything, can't even die. Use "kill -KILL", then "kill -CONT", so the KILL signal could be delivered and do the job.