retain_initrd [RAM] Keep initrd memory after extraction
+ rfkill.default_state=
+ 0 "airplane mode". All wifi, bluetooth, wimax, gps, fm,
+ etc. communication is blocked by default.
+ 1 Unblocked.
+
+ rfkill.master_switch_mode=
+ 0 The "airplane mode" button does nothing.
+ 1 The "airplane mode" button toggles between everything
+ blocked and the previous configuration.
+ 2 The "airplane mode" button toggles between everything
+ blocked and everything unblocked.
+
rhash_entries= [KNL,NET]
Set number of hash buckets for route cache