diff options
| author | Frederic Weisbecker <[email protected]> | 2020-11-13 13:13:26 +0100 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2021-01-06 16:24:59 -0800 |
| commit | e3abe959fbd57aa751bc533677a35c411cee9b16 (patch) | |
| tree | 8f5c984ffbf4d963e72672e15a66282138a268ad /kernel | |
| parent | b9ced9e1ab51ed6057ac8198fd1eeb404a32a867 (diff) | |
rcu/nocb: Only cond_resched() from actual offloaded batch processing
During a toggle operations, rcu_do_batch() may be invoked concurrently
by softirqs and offloaded processing for a given CPU's callbacks.
This commit therefore makes sure cond_resched() is invoked only from
the offloaded context.
Cc: Josh Triplett <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Neeraj Upadhyay <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Inspired-by: Paul E. McKenney <[email protected]>
Tested-by: Boqun Feng <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcu/tree.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 83362f6f1119..4ef59a5416a3 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2516,8 +2516,7 @@ static void rcu_do_batch(struct rcu_data *rdp) /* Exceeded the time limit, so leave. */ break; } - if (offloaded) { - WARN_ON_ONCE(in_serving_softirq()); + if (!in_serving_softirq()) { local_bh_enable(); lockdep_assert_irqs_enabled(); cond_resched_tasks_rcu_qs(); |