From: Justin Pettit <jpettit@...>
Date: December 9, 2013 at 1:59:27 PM PST
To: alagalah <alagalah@...>
Cc: "discuss@..." <discuss@...>
Subject: Re: QoS "isRoot" rationale?

On Dec 9, 2013, at 1:16 PM, alagalah <alagalah@...> wrote:

I was wondering if someone could explain the rationale behind the QoS Table having "isRoot"=True?

I understand why Queues has it, but wasn't sure as to why QoS ?

Is this simply to preserve it from garbage collection so QoS configurations can be re-used without losing them if the last reference in Port is removed?

In short, yes.  Here's an explanation from when the code went in that goes into a bit more detail (in the first paragraph):

   http://openvswitch.org/pipermail/dev/2011-March/007319.html

--Justin