Re: OSSTest: How to resue Xen

[Ian Campbell <ian.campbell@citrix.com>]

On Thu, 2014-08-28 at 11:47 +0100, Wei Liu wrote:
> On Thu, Aug 28, 2014 at 10:23:58AM +0000, Hu, Robert wrote:
> > > -----Original Message-----
> > > From: xen-devel-bounces@lists.xen.org
> > > [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Wei Liu
> > > Sent: Thursday, August 28, 2014 6:17 PM
> > > To: Hu, Robert
> > > Cc: Wei Liu; Pang, LongtaoX; 'Ian Jackson'; Ian Campbell; xen-devel@lists.xen.org
> > > Subject: Re: [Xen-devel] OSSTest: How to resue Xen
> > > 
> > > On Thu, Aug 28, 2014 at 03:10:51AM +0000, Hu, Robert wrote:
> > > > Hi,
> > > >
> > > > We know we can reuse host by setting OSSTEST_HOST_REUSE=1 in
> > > environment.
> > > > I'm wondering is there any way to reuse Xen install? And even guest reuse
> > > possible?
> > > >
> > > 
> > > What is the difference between reusing host and "reuse Xen install"?
> > > 
> > > If what you want is not to compile Xen every time I think OSSTest
> > > already does that.
> > > 
> > Reuse host prevents host reinstall.
> > 'Reuse Xen' here I mentioned is not to re-invoke ts-xen-install in sg-run-job. In sg-run-job, once it invokes ts-xen-install, the latter will install Xen on host; not compiling it, which is done in build-* job.
> 
> OIC.
> 
> I don't know how to skip a specific test step. Perhap Ian and Ian
> know some magic runes to do so.
> 
> Looking at the source code, OSSTEST_HOST_REUSE sets $ho->{SharedReady},
> then ts-host-install and ts-xen-build-prep exits if it's set. Perhaps
> you can have a similar check for ts-xen-install.

That's the sort of thing I was thinking of, although perhaps not in a
way which changes the existing semantics of OSSTEST_HOST_REUSE from
"reuse the host but reinstall Xen" to "reuse the host including running
Xen".

If all you want to do is rerun a specific test step then ./standalone
run-test rather than run-job lets you run a single ts-*.

Ian.