refscale: Add preempt_disable() readers

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This commit adds refscale readers based on preempt_disable() and
preempt_enable() ("refscale.scale_type=preempt").  On my x86 laptop, these
are about 2.8ns.

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

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Paul E. McKenney 2025-11-02 14:49:44 -08:00 • committed by Frederic Weisbecker

parent 78a731cefc

commit 057df3eaca

1 changed files with 32 additions and 1 deletions

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kernel/rcu/refscale.c

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