From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: [OSSTEST PATCH 3/4] Add nested testcase of
 installing L2 guest VM
Date: Thu, 8 Jan 2015 17:25:10 +0000
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To: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>, "Ian.Jackson@eu.citrix.com" <Ian.Jackson@eu.citrix.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, "Hu,
	Robert" <robert.hu@intel.com>, "Pang,
	LongtaoX" <longtaox.pang@intel.com>, "Zheng, Di" <di.zheng@intel.com>
List-Id: xen-devel@lists.xenproject.org

On Thu, 2015-01-08 at 18:20 +0100, Dario Faggioli wrote:
> On Tue, 2015-01-06 at 03:28 +0000, Pang, LongtaoX wrote:
> > [Pang, LongtaoX] 
> > [Pang, LongtaoX] Thanks for checking. We used ts-debian-hvm-install for installing L1 HVM guest via ISO Image, 
> > because we will build XEN, XEN-Tools and dom0 kernel inside it, and then we will install L2 guest inside L1.
> >
> This has been asked already, and so far, I haven't seen an answer: why
> do you want to rebuild Xen, the toolstack, and even Dom0 kernel inside
> the L1 guest, instead than just installing them (with ts-xen-install)?

Indeed, building inside the L1 guest seems like a waste of CPU time when
the bits are already built natively in the flights build-* jobs.

Even if it was desired for some reason then the right approach would be
to point ts-{xen,linux}-build{,-prep} at the L1 guest, not to duplicate
the functionality in ts-debian-hvm-install (see my earlier reply to
Robert regarding what ts-debian-hvm-install's scope should be).

Ian.