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manual: Document lack of conformance of sched_* functions [BZ #14829]

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On Linux, we define _POSIX_PRIORITY_SCHEDULING, but functions such
as sched_setparam and sched_setscheduler apply to individual threads,
not processes.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2019-02-02 14:13:33 +01:00
parent 4dcbbc3b28
commit c70824b9a4
3 changed files with 48 additions and 27 deletions
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5
sysdeps/unix/sysv/linux/bits/posix_opt.h
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@ -25,7 +25,10 @@
/* Processes have a saved set-user-ID and a saved set-group-ID. */
#define _POSIX_SAVED_IDS 1
/* Priority scheduling is supported. */
/* Priority scheduling is not supported with the correct semantics,
but GNU/Linux applications expect that the corresponding interfaces
are available, even though the semantics do not meet the POSIX
requirements. See glibc bug 14829. */
#define _POSIX_PRIORITY_SCHEDULING 200809L
/* Synchronizing file data is supported. */