Re: raisin and minios stubdom

[Juergen Gross <jgross@suse.com>]

On 01/04/17 08:19, Géza Gémes wrote:
> 
> 
> 2017. márc. 31. 16:15 ezt írta ("Juergen Gross" <jgross@suse.com
> <mailto:jgross@suse.com>>):
> 
>     On 31/03/17 16:05, Konrad Rzeszutek Wilk wrote:
>     > On Thu, Mar 30, 2017 at 07:42:48PM +0200, Gémes Géza wrote:
>     >>
>     >>> On Mon, Mar 27, 2017 at 09:28:14PM +0200, Gémes Géza wrote:
>     >>>> Hi,
>     >>>>
>     >>>> Currently the xen build system has optional support for
>     building a minios
>     >>>> (+needed libraries and tools) based stubdom.
>     >>>>
>     >>>> What is your opinion about moving support for building this
>     into raisin and
>     >>>> once that is stable drop support in the xen build system?
>     >>> Why? I do like doing 'make' and 'make install' and it doing
>     everything
>     >>> for me.
>     >>>
>     >>>> Cheers,
>     >>>>
>     >>>> Geza
>     >>>>
>     >>>>
>     >>>> _______________________________________________
>     >>>> Xen-devel mailing list
>     >>>> Xen-devel@lists.xen.org <mailto:Xen-devel@lists.xen.org>
>     >>>> https://lists.xen.org/xen-devel <https://lists.xen.org/xen-devel>
>     >>
>     >> Because it means that xen build needs to download and build a lot
>     of 3PP
>     >> components. Raisin is already designed to do so (it already
>     builds qemu-xen,
>     >
>     > If you do 'make src-tarball' it will do that for you - and you can
>     package
>     > all of that in a tarball.
>     >
>     >> qemu-traditional, libvirt and a few others). I think building
>     anything
>     >> besides xen proper would fit its scope better.
>     >
>     > OK, but that does not square well with RPM build systems. Those
>     are interested
>     > in building just one component (xen+toolstack+its extra pieces). Using
>     > raisin to build everything is not going to fly.
>     >
>     > (Also distros like to seperate componets out - so they build
>     qemu-upstream
>     > seperate - which is used by Xen - and they could also do it for MiniOS
>     > if they were spec files for it and such).
> 
>     There are only few stubdoms you can build without the Xen tree. How
>     would you do so for e.g. xenstore-stubdom needing the Xenstore sources
>     to be built? Several stubdoms need libxc built for stubdom included.
>     And you want to have a build error if e.g. a libxc modification is
>     breaking stubdom build.
> 
> 
>     Juergen
> 
> Hi,
> 
> Raisin already builds xen too, so it has all the dependencies ready.
> Regarding the problem of breaking stubdom build by libxc changes I think
> those can be prevented if we introduce osstests for raisin build. Maybe
> we should start with that, adding raisin to the osstest framework.
> Opinions?

osstest is too late. I want to see a build error _before_ sending a
patch.

So how is raisin working exactly? Is it possible to do incremental
buils or is the build always complete? Can I start builds of only a
subtree? Is it possible to use a private version of some sub-component?

I'm not opposed to use raisin e.g. in osstest. I'm opposed to a change
in the developer workflow requiring to spend either much more time for
testing the build or to add additional steps for it. One-time changes
are fine, changes requiring the developer not to forget an additional
command are not.


Juergen

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