Re: [Suspend2-devel] Problem with CFS V20 and Suspend2/tuxonice

Ingo Molnar
2007-08-25T19:02:31Z

* Christian Hesse <mail@earthworm.de> wrote:

> > Reproduced on a Intel Centrino based laptop with gentoo kamikaze7
> > sources (http://forums.gentoo.org/viewtopic-t-577970.html)
>
> Same problem here: Core Duo, Kernel 2.6.22.5, Suspend 2.2.10, CFS v20.2.

please try the patch below - does it fix the problem?

Ingo

Index: linux-cfs-2.6.22.5.q/kernel/sched.c
===================================================================
--- linux-cfs-2.6.22.5.q.orig/kernel/sched.c
+++ linux-cfs-2.6.22.5.q/kernel/sched.c
@@ -5043,6 +5043,8 @@ static int migration_thread(void *data)
struct migration_req *req;
struct list_head *head;

+ try_to_freeze();
+
spin_lock_irq(&rq->lock);

if (cpu_is_offline(cpu)) {
@@ -5399,6 +5401,7 @@ migration_call(struct notifier_block *nf
p = kthread_create(migration_thread, hcpu, "migration/%d", cpu);
if (IS_ERR(p))
return NOTIFY_BAD;
+ p->flags |= PF_NOFREEZE;
kthread_bind(p, cpu);
/* Must be high prio: stop_machine expects to yield to it. */
rq = task_rq_lock(p, &flags);