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

[Thomas Meyer]

Milan Broz schrieb:
> Thomas Meyer napsal(a):
>   
> > Rafael J. Wysocki schrieb:
> >     
> > > On Sunday, 11 March 2007 21:23, Milan Broz wrote:
> > >   
> > >       
> > > > Rafael J. Wysocki:
> > > >     
> > > >         
> > > > > Ah, NO_HZ.  Thomas Gleixner's address added to the Cc list.
> > > > >
> > > > >       
> > > > >           
> > > > > > 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)
> > > > > >         
> > > > > >             
> > > > > Well, I think the call to wait_for_completion() does not return, probably
> > > > > because the task supposed to complete the completion is frozen at this
> > > > > point.  Can you please try to confirm that it gets stuck on
> > > > > wait_for_completion() in synchronize_rcu()?
> > > > >       
> > > > >           
> > > > Yes, it's in wait_for_completion() in synchronize_rcu().
> > > > As noted in some previous mail, it will wake up after
> > > > event - key press etc.
> > > >
> > > > Patch in http://lkml.org/lkml/2007/3/7/255 solves different problem.
> > > > I added it to my quilt and applied anyway -> no change.
> > > >     
> > > >         
> > > Does the problem go away if NO_HZ is unset?
> > >   
> > >       
> > i tried to boot with nohz=off, but the problem did persist.
> >     
>
> Hmmmm, both variants (nohz=off or recompiled kernel without NO_HZ) works for me.
>
> Milan
>   

I got a working config:

Without hrtimers and without nohz it is working!

With hrtimers and without nohz it is not working
With hrtimers and with nohz it is not working

Now i want to test: without hrtimers and with nohz.





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