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xen-devel
Re: [Xen-devel] Using xen-unstable, dom0 hangs during boot
On Fri, Feb 26, 2010 at 06:33:27AM -0700, Nadolski, Ed wrote:
> > -----Original Message-----
> > From: Jeremy Fitzhardinge [mailto:jeremy@xxxxxxxx]
> > Sent: Thursday, February 25, 2010 4:12 PM
> > To: Nadolski, Ed
> > Cc: Xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-devel] Using xen-unstable, dom0 hangs during boot
> >
> > On 02/25/2010 02:18 PM, Nadolski, Ed wrote:
> > > I'm running Fedora 12 (kernel 2.6.31.5-127.fc12.x86_64) on a Dell
> > T7500 Xeon with VT-x and VT-d. After building xen-unstable and
> > rebooting, the dom0 Linux hangs a few seconds after it gets control
> > from Xen, and I have to power-cycle to recover. Here are the last
> > messages before it hangs:
> > >
> > > [ 2.766882] loop: module loaded
> > > [ 2.767736] input: Macintosh mouse button emulation as
> > /devices/virtual/input/input2
> > > [ 2.769396] xen_set_ioapic_routing: irq 20 gsi 20 vector 20 ioapic
> > 0 pin 20 triggering 1 polarity 1
> > > [ 2.770342] achi 0000:00:1f.2: PCI INT C -> GSI 20 (level, low) -
> > > IRQ 20
> > > [ 2.771158] ahci 0000:00:1f.2: AHCI 0001.0200 32 slots 6 ports 3
> > Gbps 0x27 impl SATA mode
> > > [ 2.772078] ahci 0000:00:1f.2: flags: 64bit ncq sntf led clo pio
> > ems
> > > <<hangs at this point>>
> > >
> > > Thoughts? Any grub parameters I should try for Linux and/or Xen?
> > Any further info I can provide?
> > >
> >
> > What kernel is this? What's the boot command line?
>
> The build downloaded the kernel from:
>
> + git clone git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
> linux-2.6-pvops.git.tmp
>
> The serial console output stops before the Linux kernel messages show up, but
> here is what I have in grub.conf:
>
> title Fedora12-Xen (2.6.31.6) Xen and dom0 serial console
> root (hd0,0)
> kernel /xen-4.0.0-rc4.gz com1=115200,8n1 console=com1
> module /vmlinuz-2.6.31.6 ro
> root=UUID=d9c5bf5d-23d1-445e-9210-e6ad0798a0ba nomodeset LANG=en_US.UTF-8
> SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us console=tty0
> console=ttyS0,115200
> module /initramfs-2.6.31.6.img
>
> but it still fails the same way regardless of the vmlinuz parameters. With
> the serial port enabled, the hang happens a bit sooner, at the serial driver
> init. Also, no change if I disable VTx/VTd in the BIOS.
>
You should use grub configuration like this:
title pv_ops dom0 with a serial console
root (hd0,0)
kernel /xen-4.0.0-rc4.gz dom0_mem=1024M loglvl=all guest_loglvl=all
sync_console console_to_ring com1=115200,8n1 console=com1
module /vmlinuz-2.6.31.6 ro root=/dev/vg00/lv01 console=hvc0
earlyprintk=xen nomodeset
module /initrd-2.6.31.6.img
Modify the root parameter etc for your environment.
Note that vmlinuz (dom0 kernel) needs to have "console=hvc0 earlyprintk=xen"
to log to a serial console through Xen.
-- Pasi
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