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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-06-21 13:00:57 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-08-18 18:58:43 -0700
commiteb348b898290da242e46df75ab0b9772003e08b8 (patch)
treef35ed4203ca3af3489e780430685a09bcb6a5f92 /kernel/rcutree.h
parent2333210b26cf7aaf48d71343029afb860103d9f9 (diff)
downloadop-kernel-dev-eb348b898290da242e46df75ab0b9772003e08b8.zip
op-kernel-dev-eb348b898290da242e46df75ab0b9772003e08b8.tar.gz
nohz_full: Add per-CPU idle-state tracking
This commit adds the code that updates the rcu_dyntick structure's new fields to track the per-CPU idle state based on interrupts and transitions into and out of the idle loop (NMIs are ignored because NMI handlers cannot cleanly read out the time anyway). This code is similar to the code that maintains RCU's idea of per-CPU idleness, but differs in that RCU treats CPUs running in user mode as idle, where this new code does not. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.h')
-rw-r--r--kernel/rcutree.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 52d1be1..9dd8b17 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -553,6 +553,8 @@ static void rcu_boot_init_nocb_percpu_data(struct rcu_data *rdp);
static void rcu_spawn_nocb_kthreads(struct rcu_state *rsp);
static void rcu_kick_nohz_cpu(int cpu);
static bool init_nocb_callback_list(struct rcu_data *rdp);
+static void rcu_sysidle_enter(struct rcu_dynticks *rdtp, int irq);
+static void rcu_sysidle_exit(struct rcu_dynticks *rdtp, int irq);
static void rcu_sysidle_init_percpu_data(struct rcu_dynticks *rdtp);
#endif /* #ifndef RCU_TREE_NONCORE */
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