Hosting xenstore in a separate domain

Hosting xenstore in a separate domain

[Adam McKibben]

I've noticed a few projects aimed at dis-aggregating dom0 (stubdom and
Derek Murray's project to move the domain builder to its own domain).

Has anyone tried to host xenstore in a domain other than Dom0?

What difficulties might such a project encounter?


Thanks

Re: Hosting xenstore in a separate domain

[Keir Fraser]

There are pending patches for this from Diego Ongaro and Alex Zeffert.
Should be in xen-unstable pretty soon now.

 -- Keir

On 11/06/2009 23:07, "Adam McKibben" <adam.mckibben@jhuapl.edu> wrote:

> I've noticed a few projects aimed at dis-aggregating dom0 (stubdom and
> Derek Murray's project to move the domain builder to its own domain).
> 
> Has anyone tried to host xenstore in a domain other than Dom0?
> 
> What difficulties might such a project encounter?
> 
> 
> Thanks
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: Hosting xenstore in a separate domain

[Alex Zeffertt]

Please note that these xen-unstable patches depend on some minor dom0 kernel 
patches (*).  I updated Diego's linux-2.6.18-xen.hg patches and posted them to 
this list.  But if you're using an alternate dom0 kernel you'll need to forward 
port these.

Regards,

Alex

(*) The kernel patches provide an ioctl for the xenstore domain builder to 
create a grant ref and event chan which enables the xenstore domain to access 
dom0's xenstore page.

Keir Fraser wrote:
> There are pending patches for this from Diego Ongaro and Alex Zeffert.
> Should be in xen-unstable pretty soon now.
> 
>  -- Keir
> 
> On 11/06/2009 23:07, "Adam McKibben" <adam.mckibben@jhuapl.edu> wrote:
> 
>> I've noticed a few projects aimed at dis-aggregating dom0 (stubdom and
>> Derek Murray's project to move the domain builder to its own domain).
>>
>> Has anyone tried to host xenstore in a domain other than Dom0?
>>
>> What difficulties might such a project encounter?
>>
>>
>> Thanks
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
> 
> 
> 

Re: Hosting xenstore in a separate domain

[Keir Fraser]

Just to check, your tools patches are backwards compatible with old dom0
kernels when running xenstored in dom0?

 -- Keir

On 15/06/2009 10:06, "Alex Zeffertt" <Alex.Zeffertt@eu.citrix.com> wrote:

> Please note that these xen-unstable patches depend on some minor dom0 kernel
> patches (*).  I updated Diego's linux-2.6.18-xen.hg patches and posted them to
> this list.  But if you're using an alternate dom0 kernel you'll need to
> forward 
> port these.
> 
> Regards,
> 
> Alex
> 
> (*) The kernel patches provide an ioctl for the xenstore domain builder to
> create a grant ref and event chan which enables the xenstore domain to access
> dom0's xenstore page.
> 
> Keir Fraser wrote:
>> There are pending patches for this from Diego Ongaro and Alex Zeffert.
>> Should be in xen-unstable pretty soon now.
>> 
>>  -- Keir
>> 
>> On 11/06/2009 23:07, "Adam McKibben" <adam.mckibben@jhuapl.edu> wrote:
>> 
>>> I've noticed a few projects aimed at dis-aggregating dom0 (stubdom and
>>> Derek Murray's project to move the domain builder to its own domain).
>>> 
>>> Has anyone tried to host xenstore in a domain other than Dom0?
>>> 
>>> What difficulties might such a project encounter?
>>> 
>>> 
>>> Thanks
>>> 
>>> 
>>> _______________________________________________
>>> Xen-devel mailing list
>>> Xen-devel@lists.xensource.com
>>> http://lists.xensource.com/xen-devel
>> 
>> 
>> 
> 

Re: Hosting xenstore in a separate domain

[Alex Zeffertt]

Yes.  You only need a patched kernel if you uncomment the '#STUBDOM=yes' line in 
/etc/sysconfig/xenstore.  By default xenstore stubdoms are not enabled, and you 
get a dom0 daemon that works equally well with a patched kernel or an unpatched 
kernel.

Regards,

Alex

Keir Fraser wrote:
> Just to check, your tools patches are backwards compatible with old dom0
> kernels when running xenstored in dom0?
> 
>  -- Keir
> 
> On 15/06/2009 10:06, "Alex Zeffertt" <Alex.Zeffertt@eu.citrix.com> wrote:
> 
>> Please note that these xen-unstable patches depend on some minor dom0 kernel
>> patches (*).  I updated Diego's linux-2.6.18-xen.hg patches and posted them to
>> this list.  But if you're using an alternate dom0 kernel you'll need to
>> forward 
>> port these.
>>
>> Regards,
>>
>> Alex
>>
>> (*) The kernel patches provide an ioctl for the xenstore domain builder to
>> create a grant ref and event chan which enables the xenstore domain to access
>> dom0's xenstore page.
>>
>> Keir Fraser wrote:
>>> There are pending patches for this from Diego Ongaro and Alex Zeffert.
>>> Should be in xen-unstable pretty soon now.
>>>
>>>  -- Keir
>>>
>>> On 11/06/2009 23:07, "Adam McKibben" <adam.mckibben@jhuapl.edu> wrote:
>>>
>>>> I've noticed a few projects aimed at dis-aggregating dom0 (stubdom and
>>>> Derek Murray's project to move the domain builder to its own domain).
>>>>
>>>> Has anyone tried to host xenstore in a domain other than Dom0?
>>>>
>>>> What difficulties might such a project encounter?
>>>>
>>>>
>>>> Thanks
>>>>
>>>>
>>>> _______________________________________________
>>>> Xen-devel mailing list
>>>> Xen-devel@lists.xensource.com
>>>> http://lists.xensource.com/xen-devel
>>>
>>>
> 
> 
>