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authorDietmar Eggemann <dietmar.eggemann@arm.com>2021-01-28 16:10:40 +0300
committerIngo Molnar <mingo@kernel.org>2021-02-17 16:08:30 +0300
commitc541bb7835a306cdbbe8abbdf4e4df507e0ca27a (patch)
tree2559e3c649c457dd6db591a88768543c2a9cea08 /kernel/sched
parent9d061ba6bc170045857f3efe0bba5def30188d4d (diff)
downloadlinux-c541bb7835a306cdbbe8abbdf4e4df507e0ca27a.tar.xz
sched/core: Update task_prio() function header
The description of the RT offset and the values for 'normal' tasks needs update. Moreover there are DL tasks now. task_prio() has to stay like it is to guarantee compatibility with the /proc/<pid>/stat priority field: # cat /proc/<pid>/stat | awk '{ print $18; }' Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210128131040.296856-4-dietmar.eggemann@arm.com
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/core.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f0b0b67fcdee..4afbdd27f46d 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5616,8 +5616,12 @@ SYSCALL_DEFINE1(nice, int, increment)
* @p: the task in question.
*
* Return: The priority value as seen by users in /proc.
- * RT tasks are offset by -200. Normal tasks are centered
- * around 0, value goes from -16 to +15.
+ *
+ * sched policy return value kernel prio user prio/nice
+ *
+ * normal, batch, idle [0 ... 39] [100 ... 139] 0/[-20 ... 19]
+ * fifo, rr [-2 ... -100] [98 ... 0] [1 ... 99]
+ * deadline -101 -1 0
*/
int task_prio(const struct task_struct *p)
{