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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-06-16 15:53:18 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-09-28 21:36:33 -0700 |
| commit | 1f288094807861ec1e48c428d2c49ccf7aaf3767 (patch) | |
| tree | f8f1217bcf0a720d6ae17304b1bcb3ddbecb42be | |
| parent | a102a9ece5489e1718cd7543aa079082450ac3a2 (diff) | |
| download | linux-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>
| -rw-r--r-- | kernel/rcutorture.c | 5 | ||||
| -rw-r--r-- | kernel/rcutree_plugin.h | 5 |
2 files changed, 7 insertions, 3 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"); diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 8aafbb80b8b0..7b850cdc0aee 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -1560,7 +1560,10 @@ static int __cpuinit rcu_spawn_one_cpu_kthread(int cpu) if (!rcu_scheduler_fully_active || per_cpu(rcu_cpu_kthread_task, cpu) != NULL) return 0; - t = kthread_create(rcu_cpu_kthread, (void *)(long)cpu, "rcuc%d", cpu); + t = kthread_create_on_node(rcu_cpu_kthread, + (void *)(long)cpu, + cpu_to_node(cpu), + "rcuc%d", cpu); if (IS_ERR(t)) return PTR_ERR(t); if (cpu_online(cpu)) |