Non-privileged user get 'Operation not permitted' when using sched_setscheduler

Solution Verified - Updated -


When using sched_setscheduler in a program to change the priority it works as expected, when it is run as root. When a non-privileged user runs it, the program fails with an EPERM error - strace output:

sched_setscheduler(4798, SCHED_FIFO, { 89 }) = -1 EPERM (Operation not permitted)
sched_setscheduler(4798, SCHED_RR, { 28 }) = -1 EPERM (Operation not permitted)


  • Red Hat Enterprise Linux

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