rcu-tasks: Introduce ->percpu_enqueue_shift for dynamic queue selection

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This commit introduces a ->percpu_enqueue_shift field to the rcu_tasks
structure, and uses it to shift down the CPU number in order to
select a rcu_tasks_percpu structure.  This field is currently set to a
sufficiently large shift count to always select the CPU-0 instance of
the rcu_tasks_percpu structure, and later commits will adjust this.

Reported-by: Martin Lau <kafai@fb.com>
Cc: Neeraj Upadhyay <neeraj.iitr10@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Paul E. McKenney 2021-11-08 10:51:13 -08:00

parent cafafd6776

commit 7a30871b6a

1 changed files with 6 additions and 1 deletions

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kernel/rcu/tasks.h

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