linux-kernel - Re: [PATCH] PM / Freezer: Freeze filesystems while freezing processes (v2)

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Message-ID: <4E7FA3C7.5050503@u-club.de>
Date:	Sun, 25 Sep 2011 23:57:27 +0200
From:	Christoph <cr2005@...lub.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Dave Chinner <david@...morbit.com>,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...onice.net>,
	Christoph Hellwig <hch@...radead.org>, xfs@....sgi.com,
	LKML <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org,
	Theodore Ts'o <tytso@....edu>, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] PM / Freezer: Freeze filesystems while freezing processes
 (v2)

On 25.09.2011 15:32, Rafael J. Wysocki wrote:
> On Sunday, September 25, 2011, Christoph wrote:
>> test results of the patch below:
>> 
>> 1. real machine
>> 
>> suspends fine but on wakeup, after loading image: hard reset. nvidia
>> gpu => disabled compitz  => wakeup worked two times.
> 
> Hmm, so there's a separate bug related to NVidia I guess.

Maybe.

Just made another test: the machine (macbook) woke up, loaded image, thaw.
It got stuck at vt#1, displaying console with login. Cursor blinking, but
no (usb) keyboard or network enabled. Bricked?!!


On the other hand I've got another box with nvidia gpu:

debian5 32bit
2.6.38.2+ #3 SMP Fri Apr 1
nvidia 260.19.36

It's up since I compiled the kernel: I use it twice a week and I kept it
freezed all the time. It was solid rock until today: hard reset on resume.
WTF? (I remember this version combo was stable on the macbook but the
kernel lacks a solid wireless driver).

There are a stupid situation where you can't debug. What else can go
wrong? This is off topic but it's a cute kernel crash while I gave the
nouveau driver a chance:

http://events.ccc.de/camp/2011/wiki/File:Dome22.jpg

chris

http://events.ccc.de/camp/2011/wiki/DomeTent

> 
>> 2. virtualbox / stress test / xfs and ext4
>> 
>> on 3rd resume, it booted up "normal" like this:
>> 
>> [    3.351813] Freeing unused kernel memory: 568k freed [
>> 3.460973] Freeing unused kernel memory: 284k freed
>> 
>> [   17.328356] PM: Preparing processes for restore.
>> 

...
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