Hi Peter, Looking at the code of sched_getparam() and sched_setscheduler() (to see what might need to land in the man pagea with respect to SCHED_DEADLINE changes), I see that the former fails (EINVAL) if the target is a SCHED_DEADLINE process, while the latter succeeds (returning SCHED_DEADLINE). The sched_setscheduler() seems fine, but what's the rationale for having sched_getparam() fail in this case, rather than just returning a sched_priority of zero (since sched_priority is in any case unused, as for SCHED_OTHER, right)? My point is that the change seems to needlessly break applications that employ sched_getparam(). Maybe I am missing something... Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html