add support for software suspend with swap files

[alex f]

As of 2.6.20 the linux kernel supports software suspend with swap files in addidion to swap partitions. Please enable this from feisty 7.04 onwards.

Bug #82351 probably needs to be fixed first.

[alex f (acid-punk)]

http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=Documentation/power/swsusp-and-swap-files.txt

Is a good introduction.

[Ben Collins (ben-collins)]

Kernel doesn't need to implement anything. This is all userspace.

[Dustin Kirkland  (kirkland)]

I *think* this bug description should be modified to indicate that "hiberation" to swap files is broken rather than "suspend".

I'm using a swap file in Hardy and I can suspend/resume just fine.

I cannot, however, hibernate/resume using my swap file.

And to be perfectly precise (even pedantic), I can hibernate to a swap file just fine....but I cannot resume from it ;-)

:-Dustin

[Colin Watson (cjwatson)]

Recent activity in bug 224697 says that "Reportedly, resuming from a swap file works just fine" as of Intrepid. Does anything remain to be done here?

[Scott James Remnant (Canonical) (canonical-scott)]

On Wed, 2009-03-18 at 22:15 +0000, Colin Watson wrote:

> Recent activity in bug 224697 says that "Reportedly, resuming from a
> swap file works just fine" as of Intrepid. Does anything remain to be
> done here?
>
Not sure, swap files are something I want to spent a little time on in
the next release and make sure they *really* work properly.

Being able to have growable and shrinkable swap files has other
benefits.

Scott
--
Scott James Remnant
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