.\" 2005-07-28, mtk, Added descriptions of RLIMIT_NICE and RLIMIT_RTPRIO
.\" 2008-05-07, mtk / Peter Zijlstra, Added description of RLIMIT_RTTIME
.\"
-.TH GETRLIMIT 2 2008-10-06 "Linux" "Linux Programmer's Manual"
+.TH GETRLIMIT 2 2010-09-26 "Linux" "Linux Programmer's Manual"
.SH NAME
getrlimit, setrlimit \- get/set resource limits
.SH SYNOPSIS
.BR sched_setparam (2).
.TP
.BR RLIMIT_RTTIME " (Since Linux 2.6.25)"
-Specifies a limit on the amount of CPU time that a process scheduled
+Specifies a limit (in microseconds)
+on the amount of CPU time that a process scheduled
under a real-time scheduling policy may consume without making a blocking
system call.
For the purpose of this limit,
.BR csh (1)).
The shell's resource limits are inherited by the processes that
it creates to execute commands.
+
+Ancient systems provided a
+.BR vlimit ()
+function with a similar purpose to
+.BR setrlimit ().
+For backward compatibility, glibc also provides
+.BR vlimit ().
+All new applications should be written using
+.BR setrlimit ().
.SH BUGS
In older Linux kernels, the
.B SIGXCPU