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rcu/nocb: Make shrinker iterate only over NOCB CPUs
authorFrederic Weisbecker <frederic@kernel.org>
Wed, 29 Mar 2023 16:02:03 +0000 (18:02 +0200)
committerPaul E. McKenney <paulmck@kernel.org>
Thu, 11 May 2023 20:44:50 +0000 (13:44 -0700)
commitfbde57d2d2995375305917b3c944bc861beb84d4
tree18e06559d20a7a78fd716db3e59ffbc5c0cdc6e7tree | snapshot
parentb96a8b0b5be40f9bc9e45819f14b32ea9cdce73fcommit | diff
rcu/nocb: Make shrinker iterate only over NOCB CPUs

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>
kernel/rcu/tree_nocb.h diff | blob | history
Domain: System / Kernel;