Re: [Xen-devel] Announcing xen/master: pvops git trees rearranged

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Sep 21, 2009 at 11:18:27AM +0200, Marc - A. Dahlhaus [ Administration | 
Westermann GmbH ] wrote:
> Am Montag, den 21.09.2009, 12:03 +0300 schrieb Pasi Kärkkäinen:
> > On Mon, Sep 21, 2009 at 10:49:03AM +0200, Marc - A. Dahlhaus [ 
> > Administration | Westermann GmbH ] wrote:
> --8<--
> > > title XEN pv_ops dom0
> > > root (hd0,1)
> > > kernel /boot/xen.gz dom0_mem=512M loglvl=all guest_loglvl=all
> > > module /boot/bzImage-2.6.31-xen ro root=LABEL=ROOT earlyprintk=xen 4
> > > module /boot/initramfs-2.6.31-xen
> > > 
> > > With this one i get no output from the kernel itself at all, i think i
> > > have some things build as modules in my .config that needs to be buildin
> > > for a working vga console (might be that i need to change the
> > > earlyprintk param to vga) but didn't had the time to hunt the problem
> > > down.
> > > 
> > > 
> > > 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
> > > 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...
> > > 
> > 
> > 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.
> 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?
> 

CONFIG_HIGHPTE=y makes dom0 kernel crash for me.. there's a known race
and a hacky patch available, but no clean solution..

CONFIG_HIGHPTE=n is stable for me.

This is on 32bit PAE. 

-- Pasi


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