Re: [Xen-devel] [PATCH V3 2/5] Config.mk: update OVMF changeset

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 30/10/2013 15:05, Wei Liu ha scritto:
> On Wed, Oct 30, 2013 at 01:57:40PM +0100, Fabio Fantoni wrote:
> [...]
> > > > I also tried with Ubuntu 12.04.3, same pfn error on xl dmesg, same
> > > > performance problem (some minutes only for arrive to grub-efi of
> > > > dvd) and after other 10-15 minutes without complete the boot I did a
> > > > destroy.
> > > > Also for that logs on attachments.
> > > Is QMEU busy-looping?
> > I probably not understand exactly what you mean, the domU seems
> > continue to boot apparently but in very slow motion.
> > Qemu is always active and with low load (on average 5% cpu).
> OK. I get it. 5% CPU is OK and expected at this stage.
>
> To get an idea what your guest is doing you probably need to setup
> serial console.
>
> > > > Despite windows is bad, it seems that problems persist even in the
> > > > test linux except the shutdown with vcpu issue.
> > > >
> > > > The dom0 used have the installation of this:
> > > > http://lists.xen.org/archives/html/xen-devel/2013-10/msg01111.html
> > > > Except the git branch used (here the hvm-improve.t6) and the qemu:
> > > > QEMU_UPSTREAM_URL ?=
> > > > git://xenbits.xen.org/staging/qemu-upstream-unstable.git
> > > > QEMU_UPSTREAM_REVISION ?= master
> > > Oh please don't use staging QEMU. That introduces a new variable which
> > > makes it very hard to identify the genuine problem.
> > >
> > > Wei.
> > Is based on latest qemu stable (1.6.1).
> > I tested 1.6 fora long time without see regression and seems more
> > good than 1.3 on something.
> > Are there specific reasons to use an older version instead?
> > If there were it would not be a problem for me to recompile/re-test
> > with a qemu previous.
> If it is working fine for you then it is OK.
>
> But IMHO it is generally better to wait for specific changeset to go
> through push gate before conducting your test because that reduces the
> variables which might cause regressions.
>
> Wei.
I also tried another build without change qemu repo and changet but same 
result.
Do you have domUs working on ovmf? If yes what are differences from my 
test system?
I tried to change also domU parameters:
- removing audio, vdagent and usb redirection it changes nothing.
- switch from stdvga to cirrus vga solves the performance problem, but 
with Precise it shows always a black screen after start of grub-efi 
entry, and black screen also with windows 7 installer.
What domU vga you used on your tests?

I'm trying to setup ovmf serial console, but I have no idea on where to 
start from. Do you have some suggestions?
Thanks for any reply.

> > > > If you need more informations and/or tests tell me and I'll do/post them.
> > > >
> > > > About legacy bios support that I mentioned days ago I found this
> > > > document about:
> > > > http://code.coreboot.org/p/seabios/source/tree/master/README.CSM
> > > > Seem that need ovmf change (and probably also on hvmloader) that are
> > > > not able to do.
> > > >
> > > > Thank for any reply and sorry for my bad english.

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