Support simple math on reserved keyword expressions
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index cdd6473..9b3a684 100644
--- a/HOWTO
+++ b/HOWTO
@@ -203,7 +203,13 @@
These can be used on the command line or in the job file, and will be
automatically substituted with the current system values when the job
-is run.
+is run. Simple math is also supported on these keywords, so you can
+perform actions like:
+
+size=8*$mb_memory
+
+and get that properly expanded to 8 times the size of memory in the
+machine.
5.0 Detailed list of parameters