Re: [win-pv-devel] winpv drivers update still don't works correctly and domUs unable to boot on next reboot

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 23/10/2015 11:33, Paul Durrant ha scritto:
> > -----Original Message-----
> > From: Fabio Fantoni [mailto:fabio.fantoni@xxxxxxx]
> > Sent: 23 October 2015 10:15
> > To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> > Cc: Paul Durrant
> > Subject: winpv drivers update still don't works correctly and domUs unable to
> > boot on next reboot
> >
> > In many months I have tried numerous times with numerous winpv builds on
> > windows update 7/8/10 but most of the time still using earlier builds
> > for one or more components, and often the next reboot fails to boot.
> You have a driver incompatibility problem. You have a XENBUS 8.2.0 from 22nd 
> October, but a XENVBD 8.1.0 from 11th August. So, I think what's happing is 
> that the old XENVBD is unable to bind to the PDO created by the newer XENBUS, 
> hence no FDO is being created, hence no disk PDOs are being created, hence you 
> have no system disk and you get a 0x7B BSOD.
>
>    Paul
Even if I updated ALL the component (so all the same build), also in 
case of same "major version" ( for example 8.1.0 (1) -> 8.1.0 (2) ), the 
domU uses one or more component at the older version.
For what I remember happen mainly for disks and network components.
In some case domU was still working even if it using old build of one or 
more components, in many other cases network or disks was not working 
(for disks the domU was unable to boot like this latest).
I already tried many tests for many hours in latest months trying to 
remove the drivers, also manually remove service, files, registry keys 
ecc... (after uninstall from windows control panel) but without found a 
secure update procedure because also in many remove cases windows was 
unable to boot.
If I understand good I suppose the mainly problems are that uninstaller 
(in windows control panel) doesn't remove all effective related things, 
and removing them manually if very difficult. It seems that winpv 
components coinstaller have something wrong or missed which make unable 
to use correctly the latest  builds and/or uninstall/update the drivers.
Thanks for any reply and sorry for my bad english.

> > In my latest test:
> > Dom0:
> > Wheezy (debian 7) 64 bit with xen 4.6.0 plus some small additional patches:
> > https://github.com/Fantu/Xen/commits/rebase/m2r-testing-4.6
> > kernel is custom build of 4.1.8 with .config in attachment
> > Qemu 2.4 with some small additional patches:
> > https://github.com/Fantu/qemu/commits/rebase/upstream
> > Seabios 1.8.2
> >
> > DomU:
> > windows 10 pro 64 bit
> > xl cfg in attachment
> >
> > I updated all winpv components to latest build without saw errors but on
> > reboot windows fails to boot, in qemu log I saw a trace about and also
> > the still use older build of at least one component.
> > Full qemu log with trace in attachment.
> > I had similar problem many time with different versions of xen, qemu,
> > seabios, winpv, windows ecc...
> > I also already did at least one other report about time ago if I
> > remember good.
> >
> >
> > If you need more informations/tests tell me and I'll post them.
> >
> > Thanks for any reply and sorry for my bad english.

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