[Xen-devel] [PATCH] Allow blktap to be able to be booted as system volume for PV-on-HVM

["Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>]

Hi All,

We were testing the PV driver on the HVM domain.
When blktap was booting system volume, PV-on-HVM domain was not able to be 
started.
The configuration file is specified as follows.
disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,hda,w' ]

The error occurred by the initialization of system volume in qemu-dm.

qemu: could not open hard disk image 'aio:/xen/test/rhel5ga_full.img'

It is because "aio:" is added to the head of params in xenstore.
However, qemu-dm open device by params.

This patch corrected the problem of params on the qemu-dm.

Signed-off-by: Takanori Kasai <kasai.takanori@xxxxxxxxxxxxxx>
Signed-off-by: Tomonari Horikoshi <t.horikoshi@xxxxxxxxxxxxxx>
Signed-off-by: Tsunehisa Doi <Doi.Tsunehisa@xxxxxxxxxxxxxx>

The execution result is as follows.

# xm create -f rhel5ga_vti.conf
Using config file "./rhel5ga_vti.conf".
Started domain RHEL5GA-test2
# xm block-list RHEL5GA-test2
Vdev  BE handle state evt-ch ring-ref BE-path
768    0    0     1      -1     -1    /local/domain/0/backend/tap/75/768
...      <<= /* Waiting for booting process */
# xm block-list RHEL5GA-test2
Vdev  BE handle state evt-ch ring-ref BE-path
768    0    0     4      7      8     /local/domain/0/backend/tap/75/768

Best Regards,

--
Takanori Kasai

Attachment: allow-blktap-system-volume.patch
Description: Binary data

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