From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 22 Mar 2011 23:30:45 +0000 (-0700)
Subject: kthread: use kthread_create_on_node()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=94dcf29a11b3d20a28790598d701f98484a969da;p=openwrt%2Fstaging%2Fblogic.git

kthread: use kthread_create_on_node()

ksoftirqd, kworker, migration, and pktgend kthreads can be created with
kthread_create_on_node(), to get proper NUMA affinities for their stack and
task_struct.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 56e5dec837f0..735d87095172 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -845,7 +845,10 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
 	switch (action) {
 	case CPU_UP_PREPARE:
 	case CPU_UP_PREPARE_FROZEN:
-		p = kthread_create(run_ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
+		p = kthread_create_on_node(run_ksoftirqd,
+					   hcpu,
+					   cpu_to_node(hotcpu),
+					   "ksoftirqd/%d", hotcpu);
 		if (IS_ERR(p)) {
 			printk("ksoftirqd for %i failed\n", hotcpu);
 			return notifier_from_errno(PTR_ERR(p));
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 2df820b03beb..e3516b29076c 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -301,8 +301,10 @@ static int __cpuinit cpu_stop_cpu_callback(struct notifier_block *nfb,
 	case CPU_UP_PREPARE:
 		BUG_ON(stopper->thread || stopper->enabled ||
 		       !list_empty(&stopper->works));
-		p = kthread_create(cpu_stopper_thread, stopper, "migration/%d",
-				   cpu);
+		p = kthread_create_on_node(cpu_stopper_thread,
+					   stopper,
+					   cpu_to_node(cpu),
+					   "migration/%d", cpu);
 		if (IS_ERR(p))
 			return notifier_from_errno(PTR_ERR(p));
 		get_task_struct(p);
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 5ca7ce9ce754..04ef830690ec 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1366,8 +1366,10 @@ static struct worker *create_worker(struct global_cwq *gcwq, bool bind)
 	worker->id = id;
 
 	if (!on_unbound_cpu)
-		worker->task = kthread_create(worker_thread, worker,
-					      "kworker/%u:%d", gcwq->cpu, id);
+		worker->task = kthread_create_on_node(worker_thread,
+						      worker,
+						      cpu_to_node(gcwq->cpu),
+						      "kworker/%u:%d", gcwq->cpu, id);
 	else
 		worker->task = kthread_create(worker_thread, worker,
 					      "kworker/u:%d", id);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 0c55eaa70e39..aeeece72b72f 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3761,7 +3761,10 @@ static int __init pktgen_create_thread(int cpu)
 	list_add_tail(&t->th_list, &pktgen_threads);
 	init_completion(&t->start_done);
 
-	p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
+	p = kthread_create_on_node(pktgen_thread_worker,
+				   t,
+				   cpu_to_node(cpu),
+				   "kpktgend_%d", cpu);
 	if (IS_ERR(p)) {
 		pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
 		list_del(&t->th_list);