linux-kernel - Re: Resume after hibernation regression in 2.6.29

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Message-Id: <200903262304.24634.tvrtko@ursulin.net>
Date:	Thu, 26 Mar 2009 23:04:24 +0000
From:	"Tvrtko A. Ursulin" <tvrtko@...ulin.net>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm@...ts.linux-foundation.org,
	kernel list <linux-kernel@...r.kernel.org>,
	Tobias Diedrich <ranma+kernel@...edrich.de>,
	Ayaz Abdulla <aabdulla@...dia.com>
Subject: Re: Resume after hibernation regression in 2.6.29

On Thursday 26 March 2009 22:38:55 Pavel Machek wrote:
> On Thu 2009-03-26 22:01:03, Tvrtko A. Ursulin wrote:
> > On Thursday 26 March 2009 21:35:29 Rafael J. Wysocki wrote:
> > > On Thursday 26 March 2009, Pavel Machek wrote:
> > > > On Thu 2009-03-26 20:55:23, Tvrtko A. Ursulin wrote:
> > > > > On Thursday 26 March 2009 20:18:40 Pavel Machek wrote:
> > > > > > On Thu 2009-03-26 19:20:32, Tvrtko A. Ursulin wrote:
> > > > > > > Hi guys,
> > > > > > > I have been running custom compiled 2.6.28.7 in OpenSUSE 11.1
> > > > > > > and using hiberation/resume daily as configured by the distro.
> > > > > > > Yesterday I upgraded to 2.6.29 (make oldconfig from 2.6.28.7,
> > > > > > > attached) and after resume networking (at least) does not work.
> > > > > > > Reboot at this point takes very long because of timeouts on
> > > > > > > CIFS and whatelse.
> > > > > > >
> > > > > > > Below is how /var/log/messagess looks for one cycle
> > > > > > > (hibernate-resume-reboot) and I am also attaching kernel config
> > > > > > > and /var/log/pm-suspend.log.
> > > > > > >
> > > > > > > You will probably notice evil nvidia.ko in there but don't
> > > > > > > panic, it all happens without it as well. Tested from runlevel
> > > > > > > 3 and by running pm-hibernate. After resume from that NIC LEDs
> > > > > > > were off. I tried /etc/init.d/network restart but that hung so
> > > > > > > I ^C and tried rmmod forcedeth && modprobe forcedeth && ifup
> > > > > > > eth0 and after some time network went live again. Haven't had
> > > > > > > time to test further though, so this is all pretty rough.
> > > > > >
> > > > > > Ok, can you try to rmmod forcedeth before hibernation, then
> > > > > > insmod it after resume?
> > > > >
> > > > > Sure, after insmod and /etc/init.d/network start following resume
> > > > > network was fine. Guess I could kludge that sequence into pm
> > > > > scripts somehow but would rather avoid that since it slows down the
> > > > > cycle and would make scripts non-stock.
> > > >
> > > > Ok, I guess you need to talk to forcedeth maintainers then... sounds
> > > > like a forcedeth problem to me.
> > >
> > > I have a box with forcedeth somewhere here, I should be able to check
> > > that in the next few days.
> >
> > Not a lot activity in forcedeth.c from 2.6.28 to 2.6.29 so I will CC two
> > guys who commited changes in that period. Ayaz, Tobias, forcedeth does
> > not seem to come up after hibernation well for me. Actual hardware is:
> >
> > 00:0f.0 Ethernet controller: nVidia Corporation MCP73 Ethernet (rev a2)
> >
> > Anything more I can do just shout!
>
> Actually yes. Testing forcedeth from 2.6.28 in 2.6.29 would be nice
> way to prove problem is indeed in that module.

Good idea, I had to massage it a bit due to some API changes, but the end 
result is a correct resume which proves that the problem really is in 
forcedeth.

Tvrtko
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