diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2022-02-16 16:42:08 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-04-11 17:05:58 -0700 |
| commit | 87c5adf06bfbf14c9d13e59d5d174ff5f2aafc0e (patch) | |
| tree | 6127a3426417ec257f2f84c57fc11b1a327aa8f5 /kernel/rcu/tree_nocb.h | |
| parent | 3352911fa9b47a90165e5c6fed440048c55146d1 (diff) | |
rcu/nocb: Initialize nocb kthreads only for boot CPU prior SMP initialization
The rcu_spawn_gp_kthread() function is called as an early initcall, which
means that SMP initialization hasn't happened yet and only the boot CPU is
online. Therefore, create only the NOCB kthreads related to the boot CPU.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Uladzislau Rezki <uladzislau.rezki@sony.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tree_nocb.h')
| -rw-r--r-- | kernel/rcu/tree_nocb.h | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 3c00240833d6..46694e13398a 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -1266,22 +1266,6 @@ static void rcu_spawn_cpu_nocb_kthread(int cpu) WRITE_ONCE(rdp->nocb_gp_kthread, rdp_gp->nocb_gp_kthread); } -/* - * Once the scheduler is running, spawn rcuo kthreads for all online - * no-CBs CPUs. This assumes that the early_initcall()s happen before - * non-boot CPUs come online -- if this changes, we will need to add - * some mutual exclusion. - */ -static void __init rcu_spawn_nocb_kthreads(void) -{ - int cpu; - - if (rcu_state.nocb_is_setup) { - for_each_online_cpu(cpu) - rcu_spawn_cpu_nocb_kthread(cpu); - } -} - /* How many CB CPU IDs per GP kthread? Default of -1 for sqrt(nr_cpu_ids). */ static int rcu_nocb_gp_stride = -1; module_param(rcu_nocb_gp_stride, int, 0444); @@ -1538,10 +1522,6 @@ static void rcu_spawn_cpu_nocb_kthread(int cpu) { } -static void __init rcu_spawn_nocb_kthreads(void) -{ -} - static void show_rcu_nocb_state(struct rcu_data *rdp) { } |