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| author | Paul E. McKenney <paulmck@kernel.org> | 2023-03-04 13:40:55 -0800 |
|---|---|---|
| committer | Joel Fernandes (Google) <joel@joelfernandes.org> | 2023-04-05 13:47:18 +0000 |
| commit | 09853fb89f6bc46727ccd325c0f6f266df51d155 (patch) | |
| tree | 9c84f7bb1e3931bff9a6d2a078a157d5c15ec5b7 /kernel/rcu | |
| parent | 81573694a48599f1edf928f390c6dcab5cbb6f49 (diff) | |
| download | linux-09853fb89f6bc46727ccd325c0f6f266df51d155.tar.gz | |
rcu: Add comment to rcu_do_batch() identifying rcuoc code path
This commit adds a comment to help explain why the "else" clause of the
in_serving_softirq() "if" statement does not need to enforce a time limit.
The reason is that this "else" clause handles rcuoc kthreads that do not
block handlers for other softirq vectors.
Acked-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>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 8e880c09ab59..06cc6a6ad819 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2131,6 +2131,8 @@ static void rcu_do_batch(struct rcu_data *rdp) break; } } else { + // In rcuoc context, so no worries about depriving + // other softirq vectors of CPU cycles. local_bh_enable(); lockdep_assert_irqs_enabled(); cond_resched_tasks_rcu_qs(); |