Revert "Revert "Add Tiny-RCU""

This reverts commit c52b5c70a53696a0107e6cbd8b66bee0492b688d.
Revert "Revert "Fix ARM find-bit""

This reverts commit b72c4c438ee03ac86cf19eb27025e2ca2287d001.
Revert "Revert "Fix permissions for sysctl""

This reverts commit f72c811b95d607f111b7d66155f5abc4b1ed0277.
Revert "Create rpcrouter only once"

This reverts commit dce1ccd7543767e08d7efa7ebc42824114b55674.
Tune SmartassH3