Re: [Xen-users] Kernel panics

[Galevsky <galevsky@xxxxxxxxx>]

---------- Forwarded message ----------
From: Galevsky <galevsky@xxxxxxxxx>
Date: 5 juil. 2007 22:58
Subject: Re: [Xen-users] Kernel panics
To: Yves Dorfsman <yves@xxxxxxxxx>


2007/7/5, Yves Dorfsman <yves@xxxxxxxxx>:
> > I am currently facing pb with a xended kernel on my gentoo box. I
> > emerged =xen-sources-2.6.16.49 and made an oldconfig based on my
> > running gentoo-sources-2.6.20. So that I *should not* have pb with
> > drivers.... I just have to set the xen specific options. I based my
> > dom0 config on
>
> I actually gave up on this one, "make menuconfig" wasn't showing me
> the XEN options, and didn't have arch/xen directories, so I assumed
> there was something wrong in it. I pulled the tar ball for the xen
> web site. It does bring up an interesting point though, the one
> from the tar ball is based on 2.6.16-33 rather than -49.
okay... for me oldconfig (and also menuconfig) brings me new xen-options menu.

> > http://gentoo-wiki.com/HOWTO_Xen_and_Gentoo.
>
> Yes, I have used that document.
>
> > I cannot boot this kernel. No info at all. You can set RC_DEBUG="yes"
> > into the rc conf file, it will generate extra info into boot.log in
> > /var/log.
>
> You mean it does not even start booting up, or does it end up panic'ing ?
> Are you using an initrd ? What version of mkinitrd do you use (gentoo
> stable has tree right now) ?
I am praying all the penguins to run into K panics.... but what I face
is no boot at all, so, no little piece of log.

> > For me, no info at all, neither in dmesg, nor boot.log. I don't know
> > what to do. I think I will try a no-xen 2.6.16 kernel just to be sure
> > that the pb is coming from the xen kernel config.
>
> But... the XEN'ed kernel cannot write to the filesystem until it has
> managed to mount it, from what you are saying you don't get to that
> point, do you ?
you're right, but I am riding an ext3 fs which support is included
into the kernel itself, so I *should not* face fs problems.... but I
be sure... since no log. What's wrong on that kernel ? no idea. I
retrieved the fs/network/optim/ options (all built into the kernel, no
module to be sure) from the running kernel via make oldconfig ....

> > What was missing in the xen-sources-2.6.16.49 for you ? which driver ?
> > Maybe I face such a problem.
>
> Well JFS for sure, since my partition is JFS, but obviously something
> else too that I am not aware of :-(
JFS sounds sensible in your case :o). Maybe I am coming up against the
dark side of the dark force you faced before :o(.

Well, it is my first try with xen, and I have no idea about patching
vanilla sources to make them xen compatible -xen-sources are in for
that purpose- but if you tell me it is not a hard pain, I can have a
deeper eye on it.

Gal'

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