Xen users - May 2008 - Re: PV Drivers: XenSource ones VS GPL''ed (Ruggero Tonelli)

Hi,
> I''m testing a windows 2003r2 installation on Centos 5 so
i''im wondering
> about the reliability of Windows PV drivers on a domU running on the GPL
> "flavor" of XEN.
>
> - which are the most stable PV drivers GPL''ed ones or XenSource
ones?
The GPL''ed have some issues especially with SMP, but they are evolving
fast,
so I hope they will mature in short time.

But to the downside:  They do not work on Centos 5  or any other RHEL 
derivate. There is some bits missing in RHEL''s XEN which prevents the
drivers
from hiding the boot device. You will end up with a fatally destroyed NTFS 
Bootdevice.

Same is true for the PV drivers from Novell (that''s the third solution
out
there). They are also commercial, but they also have the hiding problem in 
Centos. 

Hopefully 5.2 will fix that (don''t know, the beta release notes
don''t mention
it, but the beta release notes for RHEL 5.2 seem to be not in sync with their 
code anyway.
> - is safe running the XenSource ones on a GPL XEN machine or vice-versa?
They will not run on GPL XEN.

Sincerly,
Klaus

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On Mon, May 12, 2008 at 11:33 PM, Klaus Steinberger <
Klaus.Steinberger@physik.uni-muenchen.de> wrote:
> But to the downside:  They do not work on Centos 5  or any other RHEL
> derivate. There is some bits missing in RHEL''s XEN which prevents
the
> drivers
> from hiding the boot device. You will end up with a fatally destroyed NTFS
> Bootdevice.
>
> Same is true for the PV drivers from Novell (that''s the third
solution out
> there). They are also commercial, but they also have the hiding problem in
> Centos.
>
> Hopefully 5.2 will fix that (don''t know, the beta release notes
don''t
> mention
> it, but the beta release notes for RHEL 5.2 seem to be not in sync with
> their
> code anyway.
>
Do you know if there is a patch CentOS 5.0/5.1 for either the GPL or Novel
drivers to fix the issue you mentioned. I tried both of them sometime back
when I was doing some research but did not achieve any significant
performance benefit in disk I/O or network. I left it at that thinking I
must have done something wrong.

Thanks,
Apoorva


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On Tuesday May 13 2008 02:33:58 am Klaus Steinberger
wrote:
> But to the downside:  They do not work on Centos 5  or any other RHEL
> derivate. There is some bits missing in RHEL''s XEN which prevents
the
> drivers from hiding the boot device. You will end up with a fatally
> destroyed NTFS Bootdevice.
Not exactly true. I''m running GPLPV just fine with Fedora 8 (0.8.4,
0.8.9).
The problem seems to be with older redhat code.

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jim burns ha scritto alle martedì 13 May 2008
> Not exactly true. I''m running GPLPV just fine with Fedora 8
(0.8.4, 0.8.9).
> The problem seems to be with older redhat code.

so.... GPL PV drivers works with centos5.1 ?

cy,

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On Tuesday May 13 2008 10:08:26 am Ruggero Tonelli
wrote:
> jim burns ha scritto alle martedì 13 May 2008
>
> > Not exactly true. I''m running GPLPV just fine with Fedora 8
(0.8.4,
> > 0.8.9). The problem seems to be with older redhat code.
>
> so.... GPL PV drivers works with centos5.1 ?
If I remember the problem reports correctly, that would be an example of
''old''
Redhat code - it doesn''t work :-( There may be internationalization
problems
left as well.

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