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authorEric Dumazet <eric.dumazet@gmail.com>2011-06-16 15:53:18 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-09-28 21:36:33 -0700
commit1f288094807861ec1e48c428d2c49ccf7aaf3767 (patch)
treef8f1217bcf0a720d6ae17304b1bcb3ddbecb42be /kernel/rcutorture.c
parenta102a9ece5489e1718cd7543aa079082450ac3a2 (diff)
downloadlinux-1f288094807861ec1e48c428d2c49ccf7aaf3767.tar.bz2
rcu: Use kthread_create_on_node()
Commit a26ac2455ffc (move TREE_RCU from softirq to kthread) added per-CPU kthreads. However, kthread creation uses kthread_create(), which can put the kthread's stack and task struct on the wrong NUMA node. Therefore, use kthread_create_on_node() instead of kthread_create() so that the stacks and task structs are placed on the correct NUMA node. A similar change was carried out in commit 94dcf29a11b3 (kthread: use kthread_create_on_node()). Also change rcutorture's priority-boost-test kthread creation. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Tejun Heo <tj@kernel.org> CC: Rusty Russell <rusty@rustcorp.com.au> CC: Andrew Morton <akpm@linux-foundation.org> CC: Andi Kleen <ak@linux.intel.com> CC: Ingo Molnar <mingo@elte.hu> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutorture.c')
-rw-r--r--kernel/rcutorture.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 98f51b13bb7e..1d2415046154 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -1280,8 +1280,9 @@ static int rcutorture_booster_init(int cpu)
/* Don't allow time recalculation while creating a new task. */
mutex_lock(&boost_mutex);
VERBOSE_PRINTK_STRING("Creating rcu_torture_boost task");
- boost_tasks[cpu] = kthread_create(rcu_torture_boost, NULL,
- "rcu_torture_boost");
+ boost_tasks[cpu] = kthread_create_on_node(rcu_torture_boost, NULL,
+ cpu_to_node(cpu),
+ "rcu_torture_boost");
if (IS_ERR(boost_tasks[cpu])) {
retval = PTR_ERR(boost_tasks[cpu]);
VERBOSE_PRINTK_STRING("rcu_torture_boost task create failed");