On Tuesday, February 11, 2020 3:44:17 AM MST Daniel P. Berrangé wrote:
> On Mon, Feb 10, 2020 at 09:05:27PM -0700, John M. Harris Jr wrote:
> 
> > On Monday, February 10, 2020 12:03:25 PM MST Robbie Harwood wrote:
> > 
> > > "John M. Harris Jr" <joh...@splentity.com> writes:
> > > 
> > > > On Saturday, January 25, 2020 2:52:05 PM MST Chris Murphy wrote:
> > > > 
> > > >> Question and (pre)proposal:
> > > >> 
> > > >> Can Fedora converge on a single swap-on-ZRAM implementation, and if
> > > >> so, which one? Fedora Workstation WG wants to move to swap-on-ZRAM
> > > >> by
> > > >> default in Fedora 33, and the working group needs to pick something
> > > >> soon.
> > > > 
> > > > 
> > > > Using swap on zram disables the ability to hibernate, making it a
> > > > non-starter for many users. If this is going to be thrown into
> > > > anything, the user needs to be asked whether they want it or not in
> > > > the installer, otherwise you're just taking away features.
> > > 
> > > 
> > > I thought you told me that the workstation group considers hibernation
> > > unsupported?  (id:2368390.zu9c8gp...@marvin.jharris.pw)
> > > 
> > > Thanks,
> > > --Robbie
> > 
> > 
> > They do, but that doesn't negate the fact that it is actually supported
> > (you  can hibernate your system), and using swap on zram outright breaks
> > hibernation (for obvious reasons).
> 
> 
> This discussion is mixing up two different interpretations of meaning
> of "supported".
> 
>   - Supported, as in, "this use case is in scope & is a release criteria"
> 
> vs
> 
>   - Supported, as in, "the functionality works from a technical POV"
> 
> Thus since hibernation is declared an unsupported use case, the fact that
> it might happen to work from a technical POV is merely good fortune and is
> not required to stay that way, even if some people might be using that now.
> 
> IOW, if swap-on-ZRAM benefits core supported use cases, then it can be
> acceptable to break unsupported use cases even if the latter currently
> work at a technical POV. Enabling this kind of trade off to be made is
> precisely why it is beneficial to define the scope of a product for
> what is supported vs unsupported.

In this case, I mean supported as in:
Users in at least KDE can open their respective menu and choose Leave -> 
Hibernate
Users can run `hibernate`
..and it just works. I'd imagine this is also the case in GNOME, though I 
don't use it actively to verify on real hardware, and that it works in qemu 
doesn't mean it works on metal. If it doesn't work on real hardware, that's a 
GNOME-specific issue.

-- 
John M. Harris, Jr.
Splentity

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