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Re: [Xen-devel] [PATCH 4/9] raisin: add a component to build qemu_traditional



On Wed, 15 Apr 2015, George Dunlap wrote:
> On 04/15/2015 05:11 PM, Stefano Stabellini wrote:
> > On Wed, 15 Apr 2015, Ian Campbell wrote:
> >> On Wed, 2015-04-15 at 16:49 +0100, Andrew Cooper wrote:
> >>>>> It would be nice if there was a --wtih-system-qemu-trad= option, but
> >>>>> that has been looked upon unfavourably by the maintainers.
> >>>> Thanks for feedback!!
> >>>> I think Raisin needs something like --with-system-qemu-trad=, so if Xen
> >>>> doesn't provide it, we'll have to carry a patch in Raisin to do it.
> >>>>
> >>>> Do you have a link to the discussion or previously rejected patch?
> >>>
> >>> I am not sure that there was ever a patch - it may have been a
> >>> discussion I had with ijc in person.
> >>
> >> Possibly I can't remember myself either.
> >>
> >>> I would be +1 for a --with-system-qemu-trad= option to mirror the
> >>> --with-system-qemu, especially as I am now not the only advocate of one.
> >>
> >> In a pre-raisin world I suppose I thought it didn't make too much sense
> >> to go through that churn if we weren't going to stop _all_
> >> cloning/downloading from within xen.git.
> >>
> >> Personally I would have considered qemu-trad very much part of the long
> >> tail wrt moving things out of xen.git, but anyway.
> >>
> >> I'd like to see raisin used/supported by osstest before we start
> >> accepting thoe sorts of xen.git patches being suggested here.
> > 
> > I think we'll have to carry those patches in Raisin anyway, otherwise
> > how are we supposed to be able to build xen 4.5? I don't think is
> > reasonable to be able to build only 4.6 onward.
> 
> Why isn't that reasonable?  It's a completely new tool.
> 
> Speaking of which -- are we going to try to make any version of raisin
> build any random version of Xen, or are we going to have "releases" of
> raisin (and subsequent branches and tags in the raisin.git tree) for
> each version we want to support?

If we cannot do any better, we can resort to that, but as a user I like
the fact that I can use raisin to build any relatively modern xen
version by simply specifying a tag.

We can figure out a way to detect whether we need to patch Xen and only
in that case do it.

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