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Re: [PATCH] PM / Freezer: Freeze filesystems while freezing processes (v

To: "Rafael J. Wysocki" <rjw@xxxxxxx>
Subject: Re: [PATCH] PM / Freezer: Freeze filesystems while freezing processes (v2)
From: Christoph <cr2005@xxxxxxxxx>
Date: Sun, 25 Sep 2011 23:57:27 +0200
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, Linux PM mailing list <linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, Nigel Cunningham <nigel@xxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx, "Theodore Ts'o" <tytso@xxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx
In-reply-to: <201109251532.20025.rjw@xxxxxxx>
References: <4E1C70AD.1010101@xxxxxxxxx> <201109250056.12545.rjw@xxxxxxx> <4E7F04B7.4020002@xxxxxxxxx> <201109251532.20025.rjw@xxxxxxx>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110818 Icedove/3.0.11
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.


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 #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:




>> 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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