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Re: [Xen-users] Xen on K6 processors

To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Subject: Re: [Xen-users] Xen on K6 processors
From: Florian Fainelli <florian@xxxxxxxxxxxxx>
Date: Tue, 13 Feb 2007 21:20:04 +0100
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Hi Mats,

Le mardi 13 février 2007, Petersson, Mats a écrit :
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> > Florian Fainelli
> > Sent: 12 February 2007 21:12
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-users] Xen on K6 processors
> >
> > Hi all,
> >
> > I am currently trying to make Xen work on a Cobalt Raq4 box.
> > The hypervisor as
> > well as the dom0 kernel works, unfortunately, it silently
> > crashes and reboot
> > back to cobalt-rom.
> >
> > I read somewhere that Xen is not compatible with non i686
> > capable processors,
> > is that true, and if so, how could we adress this limitation ?
> Whilst the "not compatible with non-i686 processor" may well be true,
> that's certainly not the reason for your crashes - as the K6 is a i686
> compatible processor.

I compiled Xen by myself using march=k6-3, to match the processor. I am sure 
K7 is i686 compatible, but not about K6-III.

> Do you by any chance have a serial port - in which case you should add
> "console=com1 com1=115200,8n1" to the kernel line in grub.conf. (that's
> the line with xen.gz on it).
> If not, perhaps you can get more info with the "noreboot" option on the
> kernel line for Xen - that way it won't just get back to the boot-rom
> when it crashes.

I actually have a serial console, what I forgot to mention in my previous 
email, is that, the box crashes when it attempts to start a dom0. To be more 
specific, I use a modified cobalt-rom, which is the bootloader which had not 
multiboot capabilities before (thus my post some weeks ago), but is now able 
to run the xen hypervisor + dom0 kernel.

> Adding "sync_console" may also help, particularly if you're using serial
> port (as will "noreboot").

I was not aware of that options, but I will have a try to see whether it 
improves the stability of the box.

> --
> Mats
> > Thank you very much in advance for your answer.
> >
> > Best regards, Florian

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