[PATCH 0/3] [linux-2.6.18-xen.hg] dom0 kernel support for xenstore stubdom

[PATCH 0/3] [linux-2.6.18-xen.hg] dom0 kernel support for xenstore stubdom

[Alex Zeffertt]

Hi all,

Last year Diego Ongaro did some work to allow xenstored to be run in a stub
domain, which never got pulled.  I have updated his patches, and got them
working with the latest xen-unstable.

There are two sets of patches.  The first (smaller) set updates the 2.6.18 dom0
kernel so that it  will support running xenstored in a stub domain.  The second
set updates tools/ stubdom/ and xen/.

After these patches are applied and everything is rebuilt, the user can enable
the xenstore stubdomain by uncommenting the 'STUBDOM=yes' line in
/etc/sysconfig/xenstore and rebooting.

Doing this offers the following two main advantages:

   1. dom0 doesn't get scheduled on every xenbus access.  This should make
xenbus accesses speedier
   2. this brings us closer to being able to reboot dom0 without needing to
reboot all the VMs.

Please consider these patches for inclusion in linux-2.6.18-xen.hg and
xen-unstable.hg

Regards,

Alex Zeffertt

Re: [PATCH 0/3] [linux-2.6.18-xen.hg] dom0 kernel support for xenstore stubdom

[Keir Fraser]

On 23/03/2009 15:19, "Alex Zeffertt" <alex.zeffertt@eu.citrix.com> wrote:

> Doing this offers the following two main advantages:
> 
>    1. dom0 doesn't get scheduled on every xenbus access.  This should make
> xenbus accesses speedier
>    2. this brings us closer to being able to reboot dom0 without needing to
> reboot all the VMs.
> 
> Please consider these patches for inclusion in linux-2.6.18-xen.hg and
> xen-unstable.hg

Good stuff, but there'd have to be a really good reason to dump this in now
before 3.4 branches. I'll hold it for when the tree re-opens in a few weeks.

 -- Keir