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

[Jia Rao <rickenrao@gmail.com>]

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Yes, that solves the problem.
Thanks a lot.
BTW. what configuration will lead me to the blktap (blktap1) driver instead
of the new blktap2 driver?

On Tue, Jun 22, 2010 at 6:57 PM, Luís Silva <luis.silva@axiomasoft.pt>wrote:

>  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 listXen-users@lists.xensource.comhttp://lists.xensource.com/xen-users
>
>
>

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