doc: rcu: Add more rationale for using rcu_read_lock_sched in checklist (090c1685) · Commits · 戴 / test

This commit explains why rcu_read_lock_sched is better than using preempt_disable. Signed-off-by:

Documentation/RCU/checklist.txt

+1 −1

Original line number	Diff line number	Diff line
		@@ -63,7 +63,7 @@ over a rather long period of time, but improvements are always welcome!
		pointer must be covered by rcu_read_lock(), rcu_read_lock_bh(),
		rcu_read_lock_sched(), or by the appropriate update-side lock.
		Disabling of preemption can serve as rcu_read_lock_sched(), but
		is less readable.
		is less readable and prevents lockdep from detecting locking issues.

		Letting RCU-protected pointers "leak" out of an RCU read-side
		critical section is every bid as bad as letting them leak out