Re: Announcing xen/master: pvops git trees rearranged

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

> > > title XEN pv_ops dom0 with serial console
> > > root (hd0,1)
> > > kernel /boot/xen.gz dom0_mem=512M loglvl=all guest_loglvl=all
> > > com1=9600,8n1 console=com1
> > > module /boot/bzImage-2.6.31-xen ro root=LABEL=ROOT console=ttyS0,9600n8
> > > earlyprintk=xen 4

Do also add 'debug' in the line. That will give some more verbose output.

> > > module /boot/initramfs-2.6.31-xen
> > > 
> > > That's the one i used to grab the log.
> > > 
> > > This is a i945 based box with an Core 2 Duo E8400 and 4GB Ram installed
> > > but only 2912584k usable because of an PCI-Card that supports only 32bit
> > > addressing (appropriated-ram-crap). Could this be a problem? I try to
> > > test again with 2GB Ram installed this evening and report if it gets any
> > > further...

If you specify 'mem=2GB' it will limit how much memory Xen and Linux see.
But you do use 'dom0_mem' which limits the amount of memory that
Dom0 would use for PCI drivers. So the 32-bit support shouldn't be an issue.

Looking at the serial line it also looks that your Linux is 32-bit? Did you
try the 64-bit?

> > > 
> > 
> > Here are my working grub.conf entries for pv_ops dom0:
> > 
> > VGA text console:
> > 
> > title Fedora Xen pv_ops dom0-test (2.6.31-rc5)
> >         root (hd0,0)
> >         kernel /xen.gz dom0_mem=1024M loglvl=all guest_loglvl=all
> >         module /vmlinuz-2.6.31-rc5 ro root=/dev/mapper/vg_dom0test-lv01
> >         module /initrd-2.6.31-rc5.img
> > 
> > 
> > Serial console:
> > 
> > title Fedora Xen pv_ops dom0-test (2.6.31-rc5) / serial console
> >         root (hd0,0)
> >         kernel /xen.gz dom0_mem=1024M loglvl=all guest_loglvl=all com1=19200,8n1 console=com1
> >         module /vmlinuz-2.6.31-rc5 ro root=/dev/mapper/vg_dom0test-lv01 console=hvc0 earlyprintk=xen
> >         module /initrd-2.6.31-rc5.img
> > 
> > When using serial console with Xen you don't need to specify serial console stuff for the dom0 kernel..
> > Also note the 'console=hvc0' for dom0 kernel..
> 
> Isn't the selection of hvc0 as main console supposed to work out
> automatically? Looks like a bug if it isn't. Anyway thanks for the hint.

Yes. As long as CONFIG_HVC_XEN is compiled in (=y).

> Will give it a try with a grub config adapted to yours later today.
> 
> Are there still problems related to specific CONFIG_ options which i
> should deactivate in my build?

It should be all clear. But we haven't tested all of them, so you might be hitting
one that hasn't been tested yet.