linux-kernel - Re: SwSusp to disk doesn't work

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Date:	Sun, 11 Mar 2007 20:50:15 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	Milan Broz <mbroz@...hat.com>, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@....cz>
Subject: Re: SwSusp to disk doesn't work - Try 2

On Sunday, 11 March 2007 20:16, Thomas Meyer wrote:
> Milan Broz schrieb:
> > 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:
> >>>       
> >
> >   
> > 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)
> >
> >   
> 
> Maybe this helps:
> 
> Mar 11 20:03:56 [kernel] PM: Removing info for No Bus:msr1
> Mar 11 20:03:56 [kernel] CPU1 is down
> Mar 11 20:03:56 [kernel] swsusp debug: Waiting for 5 seconds.
> Mar 11 20:03:56 [kernel] Enabling non-boot CPUs ...
> Mar 11 20:03:56 [kernel] _cpu_up: before notifier CPU_UP_PREPARE.
> Mar 11 20:03:56 [kernel] migration_call: Hi!
> Mar 11 20:03:56 [kernel] rcu_cpu_notify: Hi!
> Mar 11 20:03:56 [kernel] timer_cpu_notify: Hi!
> Mar 11 20:03:56 [kernel] hrtimer_cpu_notify: Hi!
> Mar 11 20:03:56 [kernel] cpu_callback: Hi!
> Mar 11 20:03:56 [kernel] workqueue_cpu_callback: Hi!
> Mar 11 20:03:56 [kernel] topology_cpu_callback: Hi!
> 
> Guess what? Hang!

Hm, you may be hitting the problem described in this thread:
http://lkml.org/lkml/2007/3/6/364 .

Can you please apply the patch at http://lkml.org/lkml/2007/3/7/255
and see if that helps?

Rafael
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