Re: [PATCH v2] INSTALL: remove unsupported XEN_CONFIG_EXPERT from documentation

[dmukhin@xen.org]

On Mon, Jan 19, 2026 at 08:29:58AM +0100, Jan Beulich wrote:
> On 16.01.2026 21:47, Stefano Stabellini wrote:
> > On Fri, 16 Jan 2026, Jan Beulich wrote:
> >> On 16.01.2026 04:08, dmukhin@xen.org wrote:
> >>> --- a/INSTALL
> >>> +++ b/INSTALL
> >>> @@ -33,11 +33,11 @@ small subset of the options.  Attempts to change other options will be
> >>>  silently overridden.  The only way to find which configuration options
> >>>  are available is to run `make menuconfig' or the like.
> >>
> >> I fear this earlier paragraph needs editing as well, which will then
> >> make more clear that ...
> >>
> >>> -You can counter-override this behaviour by setting XEN_CONFIG_EXPERT=y
> >>> -in your environment.  However, doing this is not supported and the
> >>> -resulting configurations do not receive security support.  If you set
> >>> -this variable there is nothing stopping you setting dangerously
> >>> -experimental combinations of features - not even any warnings.
> >>> +This behavior can be overridden by enabling "Configure EXPERT features"
> >>> +in Kconfig (CONFIG_EXPERT).
> >>
> >> ... this may not be quite adequate.
> >>
> > 
> > I am not sure how you would like to change the earlier paragraph or this
> > paragraph. I gave it a try and removed both paragraphs, replacing it
> > with this:
> > 
> > """
> > Only a subset of options is supported or security-supported by Xen
> > Project. You can explore all available options, including unsupported
> > ones and those recommended only for expert users, by using `make
> > menuconfig` and enabling `CONFIG_UNSUPPORTED` and/or `CONFIG_EXPERT`.
> > However, enabling these options is not supported, and configurations
> > resulting from them do not receive security support.
> > """
> > 
> > What do you think?
> 
> This would be fine with me.

Thanks Stefano and Jan.
I will send an update shortly.

--
Denis