Load average can throw error.

diff --git a/lispref/os.texi b/lispref/os.texi
index a92f550b556b3f34f59b37b862768dd718922d21..f6870245b691885b9b46119fb3c02f39adbfacb4 100644 (file)
--- a/lispref/os.texi
+++ b/lispref/os.texi
@@ -796,6 +796,11 @@ averages, which indicate the average number of processes trying to run.
 If @var{use-float} is non-@code{nil}, then they are returned
 as floating point numbers and without multiplying by 100.
 
+An error is thrown if the load average can't be obtained.  In some
+cases making it work would require Emacs being installed setuid or
+setgid so that it can read kernel information, and that usually isn't
+advisable.
+
 @example
 @group
 (load-average)