rcu: Register rcu-lazy shrinker only for CONFIG_RCU_LAZY=y kernels

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The lazy_rcu_shrink_count() shrinker function is registered even in
kernels built with CONFIG_RCU_LAZY=n, in which case this function
uselessly consumes cycles learning that no CPU has any lazy callbacks
queued.

This commit therefore registers this shrinker function only in the kernels
built with CONFIG_RCU_LAZY=y, where it might actually do something useful.

Signed-off-by: Zqiang <qiang1.zhang@intel.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>

...

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Zqiang 2023-01-30 15:17:37 +08:00 • committed by Joel Fernandes (Google)

parent db7b464df9

commit 2450b78e0b

1 changed files with 4 additions and 0 deletions

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kernel/rcu/tree_nocb.h

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