commit d6af702008117ca489a2f5476239d1688a517e98 Author: GeunSik,Lim Date: Tue May 12 17:20:32 2009 +0900 sched: fix typo in sched-rt-group.txt file Fix typo about static priority's range. * Kernel Space priority 0(high) to 98(low) --> User Space RT priority 99(high) to 1(low) with SCHED_RR or SCHED_FIFO * Kernel Space priority 99 --> sched_priority is not used in scheduling decisions (it must be specified as 0) * Kernel Space priority 100(high) to 139(low)--> User Space nice -20(high) to 19(low) For processes scheduled under one of the normal scheduling policies (SCHED_OTHER, SCHED_IDLE, SCHED_BATCH), sched_priority is not used in scheduling decisions (it must be specified as 0). Processes scheduled under one of the real-time policies(SCHED_FIFO,SCHED_RR) have a sched_priority value in the range 1 (low) to 99 (high). (reference: http://www.kernel.org/doc/man-pages/online/pages/man2/sched_setscheduler.2.html) Signed-off-by: GeunSik Lim diff --git a/Documentation/scheduler/sched-rt-group.txt b/Documentation/scheduler/sched-rt-group.txt index 5ba4d3f..1537146 100644 --- a/Documentation/scheduler/sched-rt-group.txt +++ b/Documentation/scheduler/sched-rt-group.txt @@ -169,7 +169,7 @@ get their allocated time. Implementing SCHED_EDF might take a while to complete. Priority Inheritance is the biggest challenge as the current linux PI infrastructure is geared towards -the limited static priority levels 0-139. With deadline scheduling you need to +the limited static priority levels 0-99. With deadline scheduling you need to do deadline inheritance (since priority is inversely proportional to the deadline delta (deadline - now).