Re: domU can not start in Xen 4.0.1-rc3-pre using tapdisk

["Luís Silva" <luis.silva@axiomasoft.pt>]

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Hello,

I think that in order to use tap devices with pvops kernel you have to
use "tap2:aio:path_to_file". At least it works for me... Even for 4.0.1
rc2 I had to use "tap2:tapdisk:aio:...".

Luís
On Tue, 2010-06-22 at 11:01 -0400, Jia Rao wrote:

> The domU is using pygrub to boot its own 2.6.18.8-xen kernel. It can
> be booted successfully under 2.6.18.8-xen dom0 and xen 3.3.1.
> 
> 
> 
> However when upgrade dom0 to 2.6.32.15 and xen 4.0.1-rc3-pre, the domU
> can not boot with tapdisk. I am wondering it is something related to
> the blktap driver.
> 
> 
> When using tap:aio: PATH/disk.img in domU disk configuration, the boot
> process hanged at a prompt:
> XENBUS: Waiting for devices to initialise: 295s...290s...
> Then after reboot, the domU can not mount the filesystem /dev/root and
> kernel panic.
> 
> 
> When using tap:tapdisk:aio PATH/disk.img. the booting process
> terminated at a error:
> Error: [Errno 2] No such file or directory: 'aio:/PATH/disk.img'
> 
> 
> When using file:PATH/disk.img, domU can boot successfully.
> 
> 
> Thus I am afraid it is somethin wrong with tapdisk driver in dom0
> 
> 
> FYI
> dom0: 2.6.32.15 centos 5.4
> dom0 config: 
> CONFIG_XEN_BALLOON=y
> CONFIG_XEN_SCRUB_PAGES=y
> CONFIG_XEN_DEV_EVTCHN=y
> CONFIG_XEN_BACKEND=y
> CONFIG_XEN_NETDEV_BACKEND=y
> CONFIG_XEN_BLKDEV_BACKEND=y
> CONFIG_XEN_BLKDEV_TAP=m
> CONFIG_XEN_BLKBACK_PAGEMAP=y
> CONFIG_XEN_PCIDEV_BACKEND=y
> CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
> CONFIG_XEN_BLKDEV_FRONTEND=m
> CONFIG_XEN_NETDEV_FRONTEND=m
> 
> 
> I did load the modules: blktap xen_blkfront xen_netfront before
> starting xend.
> 
> 
> xen: 4.0.1-rc3-pre
> 
> 
> any ideas?
> 
> 
> Thanks.
> 
> 
> 
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users



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