Re: Toughts on Virtualization

On Wed, 2012-04-11 at 17:38 +0300, Konstantin wrote:
> Greetings,
> 
> Tuesday, April 10, 2012, 03:13:36, Hacking Network Solutions - Gentoo List Subscriptions wrote:
> > On Mon, 2012-04-09 at 19:32 +0300, Konstantin wrote:
> >> 
> >> What kernel versions are you using for Dom0? Today I've tried to use
> >> sys-kernel/gentoo-sources-3.2.12 and couldn't find any backend driver
> >> support. Am I missed something? ;)
> >> 
> 
> > Hi Konstantin,
> > I use Xen with Gentoo for both Dom0 and DomU.
> > The back-end driver support is well hidden in the menus,
> Device Drivers  --->>  Xen driver support  --->  Backend driver support
> > is required to show them.
> > I have attached a working .config 3.2.12 for your convenience.
> 
> Thank you very much for your kernel configuration file. I've tried to
> compile 3.3.1-gentoo with slightly modified your .config by changing
> CPU to Intel Core2 and disabling Xen unnecessary for Dom0 frontend
> drivers. And kernel seems working, but not with the app-emulation/xen.
> It still crashes while booting with something like:
> 
> [ 1.391175] Code: 97 81 e8 5f ...
> [ 1.394173] RIP [<ffffffff0141a9f5>] xen_irq_init+0x15/0xa0
> [ 1.394173]  RSP <ffff...>
> [ 1.394173] CR2: 0000000000000040
> [ 1.394173] ---[ end trace 4eaa2a86a8e2da22 ]---
> [ 1.395470] swapper/0 used greatest stack depth: 4264 bytes left
> [ 1.395580] Kernel panic - not syncing: Attempted to kill init
> 
> Right now I've tried to use latest xen ebuilds:
> 
> [I] app-emulation/xen
>      Available versions:  3.4.2-r4!t 4.1.1-r2!t (~)4.1.2!t {acm custom-cflags debug flask pae xsm}
>      Installed versions:  4.1.2!t(05:24:10 PM 04/11/2012)(-custom-cflags -debug -flask -pae -xsm)
> 

I may be wrong about this but I seem to remember reading somewhere that
enabling Xen always enables PAE in the kernel (on 32-bit systems) which
therefore requires that the pae use-flag be specified when building xen
and xen-tools.


> [I] app-emulation/xen-tools
>      Available versions:  3.4.2-r3 (~)3.4.2-r5 (~)4.1.1-r5 4.1.1-r6 (~)4.1.2-r2!t {acm api custom-cflags debug doc flask hvm pygrub qemu screen xend}
>      Installed versions:  4.1.2-r2!t(05:23:08 PM 04/11/2012)(api hvm pygrub qemu screen xend -custom-cflags -debug -doc -flask)
> 
> Trying to search my issue in bugzilla. May be someone could share some
> hints? ;)
>