Date:	Mon, 4 Oct 2010 10:00:24 +0200
From:	Martin Steigerwald <Martin@...htvoll.de>
To:	linux-pm@...ts.linux-foundation.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"TuxOnIce-devel" <tuxonice-devel@...onice.net>,
	Nigel Cunningham <nigelc@...a.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [linux-pm] Swsusp patches applied to suspend-2.6#linux-next

Am Samstag 02 Oktober 2010 schrieb Martin Steigerwald:
> Am Montag 27 September 2010 schrieb Nigel Cunningham:
> > Hi again Rafael.
> 
> Hi Nigel and Rafael,
> 
> > As discussed, here are the patches, modified to apply against your
> > current linux-next tree. A new first patch splits compression support
> > out into its own file, removing the need to have two versions of the
> > load_image and save_image routines, minimising the changes to the
> > remainder of the patches and making things cleaner than would
> > otherwise be the case.
> > 
> > On my laptop, single-threaded compression actually slows writing down
> > from 175MB/s to around 100-120MB/s (depending on how well the image
> > compresses). Reading speed improves from 218MB/s to around 245MB/s. I
> > expect that multithreaded writing would bring the writing (and
> > reading) speeds back up. It's on my swsusp to do list :)
> 
> Testing this now
> (2.6.36-rc4-tp42-suspend-next-vmembase-0-00253-gab9b069- dirty).

Two times I had the rather strange issue that the machine booted freshly 
instead of resuming! First I thought I maybe didn't wait until the image 
was saved, before turning the laptop off. But now it happened a second time 
and also the ThinkPad T42 has a battery in it, thus it should always be 
able to complete writing the image.

For resuming I found this in the syslog:

Oct  4 09:19:10 shambhala kernel: end_request: I/O error, dev fd0, sector 
0
Oct  4 09:19:10 shambhala kernel: PM: Starting manual resume from disk
Oct  4 09:19:10 shambhala kernel: PM: Resume from partition 8:2
Oct  4 09:19:10 shambhala kernel: PM: Checking hibernation image.
Oct  4 09:19:10 shambhala kernel: PM: Error -22 checking image file
Oct  4 09:19:10 shambhala kernel: PM: Resume from disk failed.
Oct  4 09:19:10 shambhala kernel: PM: Marking nosave pages: 
000000000009f000 - 0000000000100000
Oct  4 09:19:10 shambhala kernel: PM: Basic memory bitmaps created
Oct  4 09:19:10 shambhala kernel: PM: Basic memory bitmaps freed

What does error -22 mean?

For hibernating:

Oct  4 00:13:09 shambhala ifplugd(eth0)[15127]: Link beat lost.
Oct  4 00:13:10 shambhala NetworkManager[2146]: <info> (eth0): carrier now 
OFF (device state 1)
Oct  4 00:13:12 shambhala ifplugd(eth0)[15127]: Exiting.
Oct  4 00:13:14 shambhala postfix/master[2589]: reload -- version 2.7.1, 
configuration /etc/postfix
Oct  4 00:13:14 shambhala dhclient: Internet Systems Consortium DHCP 
Client 4.1.1-P1
Oct  4 00:13:14 shambhala dhclient: Copyright 2004-2010 Internet Systems 
Consortium.
Oct  4 00:13:14 shambhala dhclient: All rights reserved.
Oct  4 00:13:14 shambhala dhclient: For info, please visit 
https://www.isc.org/software/dhcp/
Oct  4 00:13:14 shambhala dhclient: 
Oct  4 00:13:14 shambhala dhclient: Listening on 
LPF/eth0/00:11:25:46:ec:a5
Oct  4 00:13:14 shambhala dhclient: Sending on   
LPF/eth0/00:11:25:46:ec:a5
Oct  4 00:13:14 shambhala dhclient: Sending on   Socket/fallback
Oct  4 00:13:15 shambhala dhclient: DHCPRELEASE on eth0 to 10.0.0.9 port 
67
Oct  4 00:13:18 shambhala kernel: PM: Marking nosave pages: 
000000000009f000 - 0000000000100000
Oct  4 00:13:18 shambhala kernel: PM: Basic memory bitmaps created
Oct  4 00:13:18 shambhala kernel: PM: Syncing filesystems ... done.
Oct  4 09:19:10 shambhala kernel: imklog 4.6.4, log source = /proc/kmsg 
started.
Oct  4 09:19:10 shambhala rsyslogd: [origin software="rsyslogd" 
swVersion="4.6.4" x-pid="1964" x-info="http://www.rsyslog.com"] (re)start
Oct  4 09:19:10 shambhala kernel: r hub
Oct  4 09:19:10 shambhala kernel: usbcore: registered new device driver 
usb

Which is not complete. It seems the last log messages prior to hibernating 
have not fully been written by rsyslog.

Whats going on there? I didn't see this with Nigel's patches without the 
readahead patch. But then now I am testing suspend next + his patches, 
which may well contain other patches, as far as I understand.

Any change to test with some newer state of suspend-next?

Rafael did you integrate Nigel's patches in your tree?

Ciao,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7

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