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Make some touchups

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This commit is contained in:
Justine Tunney 2022-07-15 18:07:34 -07:00
parent 6c49e36537
commit 2e3958c6dc
11 changed files with 161 additions and 63 deletions
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18
libc/calls/sched_setscheduler.c
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@ -47,12 +47,22 @@
* The `policy` must have one of:
*
* - `SCHED_OTHER` (or `SCHED_NORMAL`) for the default policy
*
* - `SCHED_RR` for real-time round-robin scheduling
*
* - `SCHED_FIFO` for real-time first-in first-out scheduling
*
* - `SCHED_BATCH` for "batch" style execution of processes if
* supported (Linux), otherwise it's treated as `SCHED_OTHER`
* - `SCHED_IDLE` for running very low priority background jobs
* if it's supported (Linux), otherwise this is `SCHED_OTHER`
*
* - `SCHED_IDLE` for running very low priority background jobs if
* it's supported (Linux), otherwise this is `SCHED_OTHER`.
* Pledging away scheduling privilege is permanent for your
* process; if a subsequent attempt is made to restore the
* `SCHED_OTHER` policy then this system call will `EPERM` (but on
* older kernels like RHEL7 this isn't the case). This policy
* isn't available on old Linux kernels like RHEL5, where it'll
* raise `EINVAL`.
*
* The `policy` may optionally bitwise-or any one of:
*
@ -65,7 +75,9 @@
* greater than or equal to sched_get_priority_min(policy) and less
* than or equal to sched_get_priority_max(policy). Linux allows the
* static priority range 1 to 99 for the `SCHED_FIFO` and `SCHED_RR`
* policies, and the priority 0 for the remaining policies.
* policies, and the priority 0 is used for the remaining policies.
* You should still consider calling the function, because on NetBSD
* the correct priority might be -1.
*
* @return the former scheduling policy of the specified process. If
* this function fails, then the scheduling policy is not changed,