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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-07-16 10:42:38 +0000
committerThomas Gleixner <tglx@linutronix.de>2012-08-13 17:01:08 +0200
commit62ab7072476ae1600e877cc62b43758e485f4f1e (patch)
treec1df0992432cf5bae0f9122d606e73628368fb8e /kernel/rcutree.c
parentbcd951cf10f24e341defcd002c15a1f4eea13ddb (diff)
downloadop-kernel-dev-62ab7072476ae1600e877cc62b43758e485f4f1e.zip
op-kernel-dev-62ab7072476ae1600e877cc62b43758e485f4f1e.tar.gz
rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread
Bring RCU into the new-age CPU-hotplug fold by modifying RCU's per-CPU kthread code to use the new smp_hotplug_thread facility. [ tglx: Adapted it to use callbacks and to the simplified rcu yield ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20120716103948.673354828@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index f08ee3b..11a4fdc 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -133,7 +133,6 @@ static int rcu_scheduler_fully_active __read_mostly;
*/
static DEFINE_PER_CPU(struct task_struct *, rcu_cpu_kthread_task);
DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_status);
-DEFINE_PER_CPU(int, rcu_cpu_kthread_cpu);
DEFINE_PER_CPU(unsigned int, rcu_cpu_kthread_loops);
DEFINE_PER_CPU(char, rcu_cpu_has_work);
@@ -1468,7 +1467,6 @@ static void rcu_cleanup_dead_cpu(int cpu, struct rcu_state *rsp)
struct rcu_node *rnp = rdp->mynode; /* Outgoing CPU's rdp & rnp. */
/* Adjust any no-longer-needed kthreads. */
- rcu_stop_cpu_kthread(cpu);
rcu_boost_kthread_setaffinity(rnp, -1);
/* Remove the dead CPU from the bitmasks in the rcu_node hierarchy. */
@@ -2595,11 +2593,9 @@ static int __cpuinit rcu_cpu_notify(struct notifier_block *self,
case CPU_ONLINE:
case CPU_DOWN_FAILED:
rcu_boost_kthread_setaffinity(rnp, -1);
- rcu_cpu_kthread_setrt(cpu, 1);
break;
case CPU_DOWN_PREPARE:
rcu_boost_kthread_setaffinity(rnp, cpu);
- rcu_cpu_kthread_setrt(cpu, 0);
break;
case CPU_DYING:
case CPU_DYING_FROZEN:
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