Alison Chaiken c8b16a6526
rcu: Elevate priority of offloaded callback threads ...
When CONFIG_PREEMPT_RT=y, the rcutree.kthread_prio command-line
parameter signals initialization code to boost the priority of rcuc
callbacks to the designated value. With the additional
CONFIG_RCU_NOCB_CPU=y configuration and an additional rcu_nocbs
command-line parameter, the callbacks on the listed cores are
offloaded to new rcuop kthreads that are not pinned to the cores whose
post-grace-period work is performed. While the rcuop kthreads perform
the same function as the rcuc kthreads they offload, the kthread_prio
parameter only boosts the priority of the rcuc kthreads. Fix this
inconsistency by elevating rcuop kthreads to the same priority as the rcuc
kthreads.
Signed-off-by: Alison Chaiken <achaiken@aurora.tech >
Signed-off-by: Paul E. McKenney <paulmck@kernel.org >
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c8b16a6526