Re: [PATCH 0/2] Preparing to phase out uswsusp

[Domenico Andreoli <cavok@debian.org>]

On Wed, Apr 29, 2020 at 01:06:01PM +0200, Rafael J. Wysocki wrote:
> On Mon, Apr 27, 2020 at 11:53 AM Domenico Andreoli
> <domenico.andreoli@linux.com> wrote:
> >
> > On Sun, Apr 26, 2020 at 05:46:37PM +0200, Rafael J. Wysocki wrote:
> > > On Monday, April 13, 2020 9:08:43 PM CEST Domenico Andreoli wrote:
> > > > Dear maintainers,
> > > >
> > > >   it is my understanding that the usermode software suspend is not any
> > > > more the first choice for suspend/hibernate needs (uswsusp tool did
> > > > not receive any update in years).
> > >
> > > While the last part is true, the user space utilities are still usable.
> > >
> >
> > Indeed I've been using them until now and work perfectly.
> >
> > > Moreover, the kernel-based hibernation is still missing one important
> > > piece with respect to the user space variant, which is image encryption.
> > >
> >
> > Interesting, is it advertised anywhere?
> 
> I'm not sure what you mean by "advertised".

Wrong and misinformed wording, encryption is also mentioned on uswsusp
web page http://suspend.sourceforge.net/.

> 
> There is a way to combine hibernation with dm-crypt which is kind of
> described by Documentation/power/swsusp-dmcrypt.rst, but the lack of
> encryption support in the built-in hibernation code is not documented
> otherwise AFAICS.

I use a full disk encryption on Debian, swap included. I've to say
that everything works flawlessly, after the pass phrase is entered it
resumes from hibernation whatever system I used to hibernate: it works
either with uswsusp or in-kernel mechanism.

Is there any advantage in the approach of swsusp-dmcrypt.rst?

Thanks,
Domenico

-- 
rsa4096: 3B10 0CA1 8674 ACBA B4FE  FCD2 CE5B CF17 9960 DE13
ed25519: FFB4 0CC3 7F2E 091D F7DA  356E CC79 2832 ED38 CB05