From: Eric Dumazet <eric.dumazet@xxxxxxxxx>
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@xxxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
Reviewed-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: <linux-arch@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/softirq.c | 5 ++++-
kernel/stop_machine.c | 6 ++++--
kernel/workqueue.c | 6 ++++--
net/core/pktgen.c | 5 ++++-
4 files changed, 16 insertions(+), 6 deletions(-)
diff -puN kernel/softirq.c~kthread-use-kthread_create_on_cpu kernel/softirq.c
--- a/kernel/softirq.c~kthread-use-kthread_create_on_cpu
+++ a/kernel/softirq.c
@@ -845,7 +845,10 @@ static int __cpuinit cpu_callback(struct
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 -puN kernel/stop_machine.c~kthread-use-kthread_create_on_cpu kernel/stop_machine.c
--- a/kernel/stop_machine.c~kthread-use-kthread_create_on_cpu
+++ a/kernel/stop_machine.c
@@ -301,8 +301,10 @@ static int __cpuinit cpu_stop_cpu_callba
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 -puN kernel/workqueue.c~kthread-use-kthread_create_on_cpu kernel/workqueue.c
--- a/kernel/workqueue.c~kthread-use-kthread_create_on_cpu
+++ a/kernel/workqueue.c
@@ -1366,8 +1366,10 @@ static struct worker *create_worker(stru
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 -puN net/core/pktgen.c~kthread-use-kthread_create_on_cpu net/core/pktgen.c
--- a/net/core/pktgen.c~kthread-use-kthread_create_on_cpu
+++ a/net/core/pktgen.c
@@ -3761,7 +3761,10 @@ static int __init pktgen_create_thread(i
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);
_
--
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