Add option to disable automatic write of sysfs attributes

Fixes: PROD-23149 (PROD:23149)

Change-Id: I14c68a0a519a63951571f966fae72fd01ec2e556
diff --git a/README.rst b/README.rst
index e4accd7..30dbec9 100644
--- a/README.rst
+++ b/README.rst
@@ -805,6 +805,22 @@
                 power/state: "root:power"
             - devices/system/cpu/cpu0/cpufreq/scaling_governor: powersave
 
+Sysfs definition with disabled automatic write. Attributes are saved
+to configuration, but are not applied during the run.
+Thay will be applied automatically after the reboot.
+
+
+.. code-block:: yaml
+
+    linux:
+      system:
+        sysfs:
+          enable_apply: false
+          scheduler:
+            block/sda/queue/scheduler: deadline
+
+.. note:: The `enable_apply` parameter defaults to `True` if not defined.
+
 Huge Pages
 ~~~~~~~~~~~~