commit 43bf3fdddfd6b0ac65ef59bec3c79d9f9064e8bd Author: GeunSik,Lim Date: Thu May 14 13:39:18 2009 +0900 ftrace: fix typo in ftrace.txt file. Fix typo about chart to map the kernel priority to user land priorities. About sched_setscheduler(2) Processes scheduled under SCHED_FIFO or SCHED_RR can have a static priority in the range 1 to 99. Signed-off-by: GeunSik Lim diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index fd9a3e6..0e17632 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -518,9 +518,14 @@ priority with zero (0) being the highest priority and the nice values starting at 100 (nice -20). Below is a quick chart to map the kernel priority to user land priorities. - Kernel priority: 0 to 99 ==> user RT priority 99 to 0 - Kernel priority: 100 to 139 ==> user nice -20 to 19 - Kernel priority: 140 ==> idle task priority + Kernel priority: 0(high) to 99(low) ==> user RT priority 99(high) to 1(low) + Kernel priority: 100(high) to 139(low) ==> user nice -20(high) to 19(low) + Kernel priority: 140 ==> idle task priority + +Processes scheduled with SCHED_OTHER or SCHED_BATCH must be assigned +the static priority 0. Processes scheduled under SCHED_FIFO or SCHED_RR +can have a static priority in the range 1 to 99. + (reference: $> man 2 sched_setscheduler) The task states are: