tree 2429539b4d80625f44cd1721366c3ac9604b1c69
parent 32033bb8725f211a57c1ba384771a34ca9df8b40
author Joel Fernandes <joelagnelf@nvidia.com> 1741201717 -0500
committer Paul E. McKenney <paulmck@kernel.org> 1744224097 -0700

EXP sched: Disable DL server if sysctl_sched_rt_runtime is -1

Currently, RCU boost testing in rcutorture is broken because it relies on
having RT throttling disabled. This means the test will always pass (or
rarely fail). This occurs because recently, RT throttling was replaced
by DL server which boosts CFS tasks even when rcutorture tried to
disable throttling (see rcu_torture_disable_rt_throttle()).

Therefore this patch prevents DL server from starting when RC torture
sets the sysctl_sched_rt_runtime to -1.

With this patch, boosting in TREE09 fails reliably if RCU_BOOST=n.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>