From c541bb7835a306cdbbe8abbdf4e4df507e0ca27a Mon Sep 17 00:00:00 2001 From: Dietmar Eggemann Date: Thu, 28 Jan 2021 14:10:40 +0100 Subject: [PATCH] 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//stat priority field: # cat /proc//stat | awk '{ print $18; }' Signed-off-by: Dietmar Eggemann Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Link: https://lkml.kernel.org/r/20210128131040.296856-4-dietmar.eggemann@arm.com --- kernel/sched/core.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index f0b0b67..4afbdd2 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) { -- 2.7.4