path: root/kernel/smpboot.c
diff options
authorThomas Gleixner <>2013-01-31 12:11:12 +0000
committerThomas Gleixner <>2013-02-14 15:29:37 +0100
commit7d7e499f7333f68b7e7f67d14b9c1480913b4afb (patch)
tree6924ef4eb2a08d7129dc1620d1a557e484df3680 /kernel/smpboot.c
parent211b0cdc7dc574e5e756bdf1cc2f4a16b7f6e07e (diff)
smpboot: Allow selfparking per cpu threads
The stop machine threads are still killed when a cpu goes offline. The reason is that the thread is used to bring the cpu down, so it can't be parked along with the other per cpu threads. Allow a per cpu thread to be excluded from automatic parking, so it can park itself once it's done Add a create callback function as well. Signed-off-by: Thomas Gleixner <> Cc: Peter Zijlstra <> Cc: Rusty Russell <> Cc: Paul McKenney <> Cc: Srivatsa S. Bhat <> Cc: Arjan van de Veen <> Cc: Paul Turner <> Cc: Richard Weinberger <> Cc: Magnus Damm <> Link: Signed-off-by: Thomas Gleixner <>
Diffstat (limited to 'kernel/smpboot.c')
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index d6c5fc054242..d4abac261779 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -183,9 +183,10 @@ __smpboot_create_thread(struct smp_hotplug_thread *ht, unsigned int cpu)
return PTR_ERR(tsk);
*per_cpu_ptr(ht->store, cpu) = tsk;
+ if (ht->create)
+ ht->create(cpu);
return 0;
@@ -225,7 +226,7 @@ static void smpboot_park_thread(struct smp_hotplug_thread *ht, unsigned int cpu)
struct task_struct *tsk = *per_cpu_ptr(ht->store, cpu);
- if (tsk)
+ if (tsk && !ht->selfparking)