Re: SwSusp to disk doesn't work - Try 2

[Milan Broz]

Rafael J. Wysocki napsal(a):
> On Sunday, 11 March 2007 19:08, Thomas Meyer wrote:
>> Suspend to disk doesn't work on my laptop.
>>
>> The suspend seems to hang while enabling the non-boot cpus again.
>>
>> with platform = "test" and state = "disk" i get this:

>> Enabling non-boot CPUs ...
...
> 
> Could you please put some printk()s in kernel/cpu.c:_cpu_up() to see where
> it gets stuck?  I bet one of the notifiers goes to sleep (cpufreq, maybe).

Hi,
I see the same problem - 2.6.21-rc3 with NO_HZ set (tickless), 
short printk trace 

enable_nonboot_cpus
 _cpu_up
  raw_notifier_callchain (CPU_UP_PREPARE)
    ...
    update_sched_domains
     detach_destroy_domains
       [waits here] --> synchronize_sched (==synchronize_rcu)


Milan


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