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[Xen-users] Problem with tap:aio

from [Simon Gao]

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Subject:	[Xen-users] Problem with tap:aio
From:	Simon Gao <gao@xxxxxxxxxxxxxxx>
Date:	Thu, 30 Aug 2007 11:31:10 -0700
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Hi,

When I try to start a domU using tap aio, the system reported following
error:

XENBUS: Timeout connecting to device: device/vbd/769 (state 3)
XENBUS: Timeout connecting to device: device/vbd/770 (state 3)
XENBUS: Device with no driver: device/console/0
VFS: Cannot open root device "hda1" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)

My domU config file is like:

name = "vm1"
kernel ="/usr/local/boot/vmlinuz-2.6.20-xenU-r2"
root = "/dev/hda1"
memory = "1024"
#disk = [ 'file:/opt/vm1.img,hda1,w','file:/opt/vm1-swap.img,hda2,w' ]
disk = [ 'tap:aio:/opt/vm1.img,hda1,w','tap:aio:/opt/vm1-swap.img,hda2,w' ]
vif = [ 'bridge=xenbr0' ]

I am using Xen 3.1.0 with kernel 2.6.20 on gentoo. File based disk image
works without any problem.

Do I miss something in kernel or domU configuration?

Simon


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