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nice.2: Add mention of RLIMIT_NICE 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-12-05 08:59:31 +01:00
parent 360c190092
commit 52694f0979
1 changed files with 10 additions and 2 deletions
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12
man2/nice.2
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@ -51,11 +51,18 @@ adds
.I inc
to the nice value for the calling thread.
(A higher nice value means a low priority.)
Only the super\%user may specify a negative increment,
or priority increase.
The range of the nice value is +19 (low priority) to \-20 (high priority).
Attempts to set a nice value outside the range are clamped to the range.
Traditionally, only a privileged process could lower the nice value
(i.e., set a higher priority).
However, since Linux 2.6.12, an unprivileged process can decrease
the nice value of a target process that has a suitable
.BR RLIMIT_NICE
soft limit; see
.BR getrlimit (2)
for details.
.SH RETURN VALUE
On success, the new nice value is returned (but see NOTES below).
On error, \-1 is returned, and
@ -120,6 +127,7 @@ returns \-1.
.BR renice (1),
.BR fork (2),
.BR getpriority (2),
.BR getrlimit (2),
.BR setpriority (2),
.BR capabilities (7),
.BR sched (7)