Re: [Xen-users] dom0 xen

[Niels Dettenbach <nd@xxxxxxxxxxxx>]

On Monday 08 March 2010 15:03:49 dky hax wrote:
> I use recently xen compiled in a gentoo system.
> I would like a question to make, what is the best system dom0 for xen?

...if you use Gentoo (like me over years as it usually just works like a 
horse) the current 

        sys-kernel/xen-sources:2.6.31-r11 (or r12)
        =app-emulation/xen-3.4.2-r1
        =app-emulation/xen-tools-3.4.2

should be a good choice under current Gentoo. 

You have to setup the Gentoo xen overlay by:

        emerge layman
        layman -L -a xen

The xen-sources from Gentoo are xenified vanilla sources by the current SuSe 
xen patches:
http://code.google.com/p/gentoo-xen-kernel/downloads/list

In my case i had to add:

echo ">=sys-kernel/xen-sources-2.6.31" >> /etc/portage/package.unmask

(this might not be required by your system - try it).


I use i.e. this in /etc/make.conf:

You might set your own hardware arch here under "-march" - afaik should be 
compatible with you settings within your kernel config (CPU type).

        CFLAGS="-march=core2 -O2 -pointer -pipe -mno-tls-direct-seg-refs"

Important is "-mno-tls-direct-seg-refs" as it impoves performance 
significantly


        USE="mmx sse sse2 xen ntplonly xen -gtk -gtk2 sdl ssl acpi unicode 
slang 
openssl -kde -X -zlib python perl pygrub api -cups -print screen -gnome ipv6 
extensible lm_sensors ioemu diskio"

"pae" is important here too if you want to run a 32bit HV with more then 6GB 
(<= 8GB RAM) or PAE guest images. You have to enable PAE within kernel too (64 
GB RAM).

A little bit older (but still working) Howto could be found here:
http://en.gentoo-wiki.com/wiki/Xen


cheers,


Niels.
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