rcu/nocb: Make shrinker iterate only over NOCB CPUs

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Callbacks can only be queued as lazy on NOCB CPUs, therefore iterating
over the NOCB mask is enough for both counting and scanning. Just lock
the mostly uncontended barrier mutex on counting as well in order to
keep rcu_nocb_mask stable.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Frederic Weisbecker 2023-03-29 18:02:03 +02:00 • committed by Paul E. McKenney

parent b96a8b0b5b

commit fbde57d2d2

1 changed files with 14 additions and 3 deletions

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17

kernel/rcu/tree_nocb.h

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