drv_arch: Add note about process termination
and freeing resources (file descriptors).
@@ -37,6 +37,14 @@ Function (PF).
User-space applications can acquire exclusive access to the FME using `open()`,
and release it using `close()` as a privileged user (root).
+.. note::
+
+```
+ In the case that an errant application terminates without freeing
+ the FME/Port resources, Linux closes all file descriptors owned by
+ the terminating process, freeing those resources.
+```
+
## Port ##
A Port represents the interface between the static FPGA fabric (the "blue
