[PATCH 2/4] RT: Add sched-domain roots

We add the notion of a root-domain which will be used later to rescope global variables to per-domain variables. Each exclusive cpuset essentially defines an island domain by fully partitioning the member cpus from any other cpuset. However, we currently still maintain some policy/state as

[PATCH 2/4] RT: Add sched-domain roots

We add the notion of a root-domain which will be used later to rescope global variables to per-domain variables. Each exclusive cpuset essentially defines an island domain by fully partitioning the member cpus from any other cpuset. However, we currently still maintain some policy/state as