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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-05-25 01:59:52 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-06-20 18:22:27 +0200 |
| commit | 5c9a9ca44fda41c5e82f50efced5297a9c19760d (patch) | |
| tree | 0bf2281afda10c0aa1869d10dcbcecbbdf85851e /kernel/rcu | |
| parent | rcu-tasks: Make trc_read_check_handler() fetch ->trc_reader_nesting only once (diff) | |
| download | linux-5c9a9ca44fda41c5e82f50efced5297a9c19760d.tar.xz linux-5c9a9ca44fda41c5e82f50efced5297a9c19760d.zip | |
rcu-tasks: Idle tasks on offline CPUs are in quiescent states
Any idle task corresponding to an offline CPU is in an RCU Tasks Trace
quiescent state. This commit causes rcu_tasks_trace_postscan() to ignore
idle tasks for offline CPUs, which it can do safely due to CPU-hotplug
operations being disabled.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: KP Singh <kpsingh@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tasks.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 8fe78a7fecaf..ec68bfe98c95 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -1451,7 +1451,7 @@ static void rcu_tasks_trace_postscan(struct list_head *hop) { int cpu; - for_each_possible_cpu(cpu) + for_each_online_cpu(cpu) rcu_tasks_trace_pertask(idle_task(cpu), hop); // Re-enable CPU hotplug now that the tasklist scan has completed. |