Re: Rename restrictedmem => guardedmem? (was: Re: [PATCH v10 0/9] KVM: mm: fd-based approach for supporting KVM)

[Fuad Tabba <tabba@google.com>]

On Mon, Apr 17, 2023 at 8:16 PM Sean Christopherson <seanjc@google.com> wrote:
 ....

> > So the fd content is inaccessible using the ordinary POSIX syscalls. It's
> > only accessible by special entities (e.g., KVM).
> >
> > Most probably I am forgetting something. But maybe that will help to find a
> > more expressive name. Maybe :)
>
> Hidden/Concealed/etc - Too close to secretmem, suffers the "hidden from whom" problem,
> and depending on the use case, the memory may not actually be concealed from the
> user that controls the VMM.
>
> Restricted - "rmem" collides with "reserved memory" in code.
>
> Guarded - Conflicts with s390's "guarded storage", has the "from whom" problem.
>
> Inaccessible - Many of the same problems as "hidden".
>
> Unmappable - Doesn't cover things like read/write, and is wrong in the sense that
> the memory is still mappable, just not via mmap().
>
> Secured - I'm not getting anywhere near this one :-)

How about "protected" ;)? _ducks_

To me the name doesn't matter much, but fwiw I have developed a liking
to "restricted", more than the previous "private", since of all of the
one-word suggestions I think it captures most of what it's trying to
do.

Cheers,
/fuad