diff options
| author |   Mike Galbraith <efault@gmx.de> | 2009-10-29 11:48:30 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-11-03 07:25:00 +0100 |
| commit | b84ff7d6f1b7f8a43414e74d972ec4c8f3361db4 (patch) | |
| tree | 7e8db08b8dd7d28780f3d08466928c907e5e0440 /kernel/kthread.c | |
| parent | sched: Disable SD_PREFER_LOCAL at node level (diff) | |
| download | linux-dev-b84ff7d6f1b7f8a43414e74d972ec4c8f3361db4.tar.xz linux-dev-b84ff7d6f1b7f8a43414e74d972ec4c8f3361db4.zip | |
sched: Fix kthread_bind() by moving the body of kthread_bind() to sched.c
Eric Paris reported that commit
f685ceacab07d3f6c236f04803e2f2f0dbcc5afb causes boot time
PREEMPT_DEBUG complaints.
[ 4.590699] BUG: using smp_processor_id() in preemptible [00000000] code: rmmod/1314
[ 4.593043] caller is task_hot+0x86/0xd0
Since kthread_bind() messes with scheduler internals, move the
body to sched.c, and lock the runqueue.
Reported-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Tested-by: Eric Paris <eparis@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1256813310.7574.3.camel@marge.simson.net>
[ v2: fix !SMP build and clean up ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/kthread.c')
| -rw-r--r-- | kernel/kthread.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index 5fe709982caa..ab7ae57773e1 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -150,29 +150,6 @@ struct task_struct *kthread_create(int (*threadfn)(void *data), EXPORT_SYMBOL(kthread_create); /** - * kthread_bind - bind a just-created kthread to a cpu. - * @k: thread created by kthread_create(). - * @cpu: cpu (might not be online, must be possible) for @k to run on. - * - * Description: This function is equivalent to set_cpus_allowed(), - * except that @cpu doesn't need to be online, and the thread must be - * stopped (i.e., just returned from kthread_create()). - */ -void kthread_bind(struct task_struct *k, unsigned int cpu) -{ - /* Must have done schedule() in kthread() before we set_task_cpu */ - if (!wait_task_inactive(k, TASK_UNINTERRUPTIBLE)) { - WARN_ON(1); - return; - } - set_task_cpu(k, cpu); - k->cpus_allowed = cpumask_of_cpu(cpu); - k->rt.nr_cpus_allowed = 1; - k->flags |= PF_THREAD_BOUND; -} -EXPORT_SYMBOL(kthread_bind); - -/** * kthread_stop - stop a thread created by kthread_create(). * @k: thread created by kthread_create(). * |