linux-kernel - Re: What about bugzilla.kernel.org / Bug 37142 / Tuxonice developer going to quit development

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Message-ID: <20111101133539.1933dc6c@xenia.leun.net>
Date:	Tue, 1 Nov 2011 13:35:39 +0100
From:	Michael Leun <ml@...ton.leun.net>
To:	richard -rw- weinberger <richard.weinberger@...il.com>
Cc:	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	nigel@...onice.net
Subject: Re: What about bugzilla.kernel.org / Bug 37142 / Tuxonice developer
 going to quit development

On Tue, 1 Nov 2011 13:20:59 +0100
richard -rw- weinberger <richard.weinberger@...il.com> wrote:

> > So, you might want to try if you can cure your dying HW with some
> > tuxonice ;-)
> 
> I've never used tuxonice. What makes it so special?

A few years ago, at least for me, it was the first really usable suspend
to disk solution working almost out of the box.


>From linux/Documentation/power/tuxonice.txt (some of that seems to be
outdated with the current in kernel implementation):


4. Why not just use the version already in the kernel?

   The version in the vanilla kernel has a number of drawbacks. The most
   serious of these are:
        - it has a maximum image size of 1/2 total memory;
        - it doesn't allocate storage until after it has snapshotted
   memory. This means that you can't be sure hibernating will work
   until you see it start to write the image;
        - it does not allow you to press escape to cancel a cycle;
        - it does not allow you to press escape to cancel resuming;
        - it does not allow you to automatically swapon a file when
          starting a cycle;
        - it does not allow you to use multiple swap partitions or
   files;
        - it does not allow you to use ordinary files;
        - it just invalidates an image and continues to boot if you
          accidentally boot the wrong kernel after hibernating;
        - it doesn't support any sort of nice display while hibernating;
        - it is moving toward requiring that you have an
   initrd/initramfs to ever have a hope of resuming (uswsusp). While
   uswsusp will address some of the concerns above, it won't address
   all of them, and will be more complicated to get set up;
        - it doesn't have support for suspend-to-both (write a
   hibernation image, then suspend to ram; I think this is known as
   ReadySafe under M$).



-- 
MfG,

Michael Leun

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