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

[Wei Liu <wei.liu2@xxxxxxxxxx>]

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.

> >
> >>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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