Re: [Xen-devel] [PATCH v5 RFC 03/14] [HACK] tools/libxc: save/restore v2 framework

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2014-06-17 at 17:17 +0100, Andrew Cooper wrote:
> On 17/06/14 17:00, Ian Campbell wrote:
> > On Wed, 2014-06-11 at 19:14 +0100, Andrew Cooper wrote:
> >> For testing purposes, the environmental variable "XG_MIGRATION_V2" allows 
> >> the
> >> two save/restore codepaths to coexist, and have a runtime switch.
> >>
> >> It is indended that once this series is less RFC, the v2 framework will
> >> completely replace v1.
> > When do you imagine that will be? It seems to me like it could/should
> > reasonably happen now.
> >
> >
> >
> 
> When I have some plausible libxl compatibility in the series, which is
> still ongoing work.
> 
> If this were to be done in two parts, we would end up with a single
> identifiable xl stream containing possibly the new or possibly the old
> libxc stream, which makes backwards compatibility much harder to retrofit.

I keep finding myself guessing whether weird wrinkles are due to this
hack or are actual wrinkles which I should complain about.

Please make the change to the final form ASAP, otherwise the review
effort is going onto the wrong thing.

Until this series is committed there is no need for any backwards compat
with intermediate forms of the series. We won't commit to it until it is
complete and non-RFC, so no need to worry about creating a halfway
converted stream now.

Ian.


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