Re: [PATCH 1/2] qemu_capabilities: Introduce QEMU_CAPS_X_USE_CANONICAL_PATH_FOR_RAMBLOCK_ID

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On Tue, Jan 12, 2021 at 12:29:58 +0100, Michal Privoznik wrote:
> On 1/12/21 12:19 PM, Peter Krempa wrote:
> > On Tue, Jan 12, 2021 at 09:29:49 +0100, Michal Privoznik wrote:
> > > This capability tracks whether memory-backend-file has
> > > "x-use-canonical-path-for-ramblock-id" attribute. Introduced into
> > > QEMU by commit v4.0.0-rc0~189^2. While "x-" prefix is considered
> > 
> > Please use a commit hash instead of this.
> > 
> > > experimental or internal to QEMU, the next commit justifies its
> > > use.
> > 
> > NACK unless qemu adds a statement to their code and documentation that
> > the this property is considered stable despite the 'x-prefix' and you
> > add a link to the appropriate qemu upstream commit once it's done.
> > 
> > We don't want to depend on experimental stuff so we need a strong
> > excuse.
> > 
> 
> That's done in the next commit. Do you want me to copy it here too? I
> figured I'd put the justification where I'm actually setting the internal
> knob.

Yes, because this is also mentioning the an 'x-' prefixed property. I
want to be absolutely clear in any places (including a comment in the
code, which you also should add into the capability code) that this is
extraordinary circumstance and that qemu is actually considering that
property stable.

I want to prevent that this commit will be used as an excuse to depend
on experimental properties which are not actually considered
non-experimental. 




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