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diff --git a/doc/guix.texi b/doc/guix.texi index 1c4d57c811..7ea9ddfe35 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -17,6 +17,7 @@ Copyright @copyright{} 2015, 2016 Mathieu Lirzin@* Copyright @copyright{} 2014 Pierre-Antoine Rault@* Copyright @copyright{} 2015 Taylan Ulrich Bayırlı/Kammer@* Copyright @copyright{} 2015, 2016 Leo Famulari@* +Copyright @copyright{} 2015, 2016 Ricardo Wurmus@* Copyright @copyright{} 2016 Ben Woodcroft@* Copyright @copyright{} 2016 Chris Marusich@* Copyright @copyright{} 2016 Efraim Flashner @@ -7570,6 +7571,35 @@ to add @var{device} to the kernel's entropy pool. The service will fail if @var{device} does not exist. @end deffn +@anchor{pam-limits-service} +@cindex session limits +@cindex ulimit +@cindex priority +@deffn {Scheme Procedure} pam-limits-service [#:limits @var{limits}] + +Return a service that installs a configuration file for the +@uref{http://linux-pam.org/Linux-PAM-html/sag-pam_limits.html, +@code{pam_limits} module}. The procedure optionally takes a list of +@code{pam-limits-entry} values, which can be used to specify +@code{ulimit} limits and nice priority limits to user sessions. + +The following limits definition sets two hard and soft limits for all +login sessions of users in the @code{realtime} group: + +@example +(pam-limits-service + (list + (pam-limits-entry "@@realtime" 'both 'rtprio 99) + (pam-limits-entry "@@realtime" 'both 'memlock 'unlimited))) +@end example + +The first entry increases the maximum realtime priority for +non-privileged processes; the second entry lifts any restriction of the +maximum address space that can be locked in memory. These settings are +commonly used for real-time audio systems. +@end deffn + + @node Scheduled Job Execution @subsubsection Scheduled Job Execution |