rcu: Distinguish "rcuo" kthreads by RCU flavor
Currently, the per-no-CBs-CPU kthreads are named "rcuo" followed by the CPU number, for example, "rcuo". This is problematic given that there are either two or three RCU flavors, each of which gets a per-CPU kthread with exactly the same name. This commit therefore introduces a one-letter abbreviation for each RCU flavor, namely 'b' for RCU-bh, 'p' for RCU-preempt, and 's' for RCU-sched. This abbreviation is used to distinguish the "rcuo" kthreads, for example, for CPU 0 we would have "rcuob/0", "rcuop/0", and "rcuos/0". Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
This commit is contained in:

committed by
Paul E. McKenney

parent
09c7b89062
commit
a488985851
@@ -64,7 +64,7 @@
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static struct lock_class_key rcu_node_class[RCU_NUM_LVLS];
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static struct lock_class_key rcu_fqs_class[RCU_NUM_LVLS];
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#define RCU_STATE_INITIALIZER(sname, cr) { \
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#define RCU_STATE_INITIALIZER(sname, sabbr, cr) { \
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.level = { &sname##_state.node[0] }, \
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.call = cr, \
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.fqs_state = RCU_GP_IDLE, \
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@@ -76,13 +76,14 @@ static struct lock_class_key rcu_fqs_class[RCU_NUM_LVLS];
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.barrier_mutex = __MUTEX_INITIALIZER(sname##_state.barrier_mutex), \
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.onoff_mutex = __MUTEX_INITIALIZER(sname##_state.onoff_mutex), \
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.name = #sname, \
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.abbr = sabbr, \
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}
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struct rcu_state rcu_sched_state =
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RCU_STATE_INITIALIZER(rcu_sched, call_rcu_sched);
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RCU_STATE_INITIALIZER(rcu_sched, 's', call_rcu_sched);
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DEFINE_PER_CPU(struct rcu_data, rcu_sched_data);
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struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh, call_rcu_bh);
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struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh, 'b', call_rcu_bh);
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DEFINE_PER_CPU(struct rcu_data, rcu_bh_data);
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static struct rcu_state *rcu_state;
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