/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_SCHED_PRIO_H #define _LINUX_SCHED_PRIO_H #define MAX_NICE 19 #define MIN_NICE -20 #define NICE_WIDTH (MAX_NICE - MIN_NICE + 1) /* * Priority of a process goes from 0..MAX_PRIO-1, valid RT * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority * values are inverted: lower p->prio value means higher priority. * * The MAX_USER_RT_PRIO value allows the actual maximum * RT priority to be separate from the value exported to * user-space. This allows kernel threads to set their * priority to a value higher than any user task. Note: * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO. */ #define MAX_USER_RT_PRIO 100 #define MAX_RT_PRIO MAX_USER_RT_PRIO #define MAX_PRIO (MAX_RT_PRIO + NICE_WIDTH) #define DEFAULT_PRIO (MAX_RT_PRIO + NICE_WIDTH / 2) /* * Convert user-nice values [ -20 ... 0 ... 19 ] * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ], * and back. */ #define NICE_TO_PRIO(nice) ((nice) + DEFAULT_PRIO) #define PRIO_TO_NICE(prio) ((prio) - DEFAULT_PRIO) /* * 'User priority' is the nice value converted to something we * can work with better when scaling various scheduler parameters, * it's a [ 0 ... 39 ] range. */ #define USER_PRIO(p) ((p)-MAX_RT_PRIO) #define TASK_USER_PRIO(p) USER_PRIO((p)->static_prio) #define MAX_USER_PRIO (USER_PRIO(MAX_PRIO)) /* * Convert nice value [19,-20] to rlimit style value [1,40]. */ static inline long nice_to_rlimit(long nice) { return (MAX_NICE - nice + 1); } /* * Convert rlimit style value [1,40] to nice value [-20, 19]. */ static inline long rlimit_to_nice(long prio) { return (MAX_NICE - prio + 1); } #endif /* _LINUX_SCHED_PRIO_H */
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autogroup.h | File | 1.2 KB | 0644 |
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clock.h | File | 2.45 KB | 0644 |
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coredump.h | File | 2.75 KB | 0644 |
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cpufreq.h | File | 887 B | 0644 |
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cputime.h | File | 5.13 KB | 0644 |
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deadline.h | File | 597 B | 0644 |
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debug.h | File | 1.41 KB | 0644 |
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hotplug.h | File | 578 B | 0644 |
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idle.h | File | 1.77 KB | 0644 |
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init.h | File | 240 B | 0644 |
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isolation.h | File | 1.33 KB | 0644 |
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jobctl.h | File | 1.46 KB | 0644 |
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loadavg.h | File | 1.17 KB | 0644 |
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mm.h | File | 7.63 KB | 0644 |
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nohz.h | File | 1.22 KB | 0644 |
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numa_balancing.h | File | 1.26 KB | 0644 |
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prio.h | File | 1.71 KB | 0644 |
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rt.h | File | 1.41 KB | 0644 |
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signal.h | File | 17.79 KB | 0644 |
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smt.h | File | 415 B | 0644 |
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stat.h | File | 1.02 KB | 0644 |
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sysctl.h | File | 2.5 KB | 0644 |
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task.h | File | 3.94 KB | 0644 |
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task_stack.h | File | 3.03 KB | 0644 |
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topology.h | File | 6.18 KB | 0644 |
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user.h | File | 1.7 KB | 0644 |
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wake_q.h | File | 1.79 KB | 0644 |
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xacct.h | File | 854 B | 0644 |
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