Re: [Xen-users] domU can not start in Xen 4.0.1-rc3-pre using ta

To:	luis.silva@xxxxxxxxxxxxx
Subject:	Re: [Xen-users] domU can not start in Xen 4.0.1-rc3-pre using tapdisk
From:	Jia Rao <rickenrao@xxxxxxxxx>
Date:	Wed, 23 Jun 2010 10:51:22 -0400
Cc:	xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date:	Wed, 23 Jun 2010 07:54:44 -0700
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=Gn0jwPHrZP1m3gt9n9pWzWflu6D3c1t3Cgb1fbnsrBc=; b=jPsxpeHxlbVt+D3J+Z6TkaV0vNTRbWxy/o/grHm++o4LgoXJyxs1ueyVksaXQfPfh4 Ha+8lCRStkGdHe9FUVzufoHuv5sGQIjGmSC489VN0ixRONDVef62dyDsiw/MJNQ3cabl /iXwm7B0GG15G8qWu6Dspd0+46qrRsdw7YREI=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=gfDNb/h+Eg5bFtE1Pt4VysBwnG36xvM3jSK5HptQlpGpo+N9mzPMmy97e37PUVnb9g 6g5cYFnmdIuK404sFapwXylzknI3keZSuZzUhn+gnOxTXc5n7KkJc6gUWJaNXMrnts+5 Wp6fg6ZDBDLWNv6P23e09GlFonbC9ggh0lalo=
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to:	<1277247422.2566.2.camel@luis-port>
List-help:	<mailto:xen-users-request@lists.xensource.com?subject=help>
List-id:	Xen user discussion <xen-users.lists.xensource.com>
List-post:	<mailto:xen-users@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References:	<AANLkTimTUZw8ZxLtCckpsT3isRQuM1goJ2haIoOEp2Aa@xxxxxxxxxxxxxx> <1277247422.2566.2.camel@luis-port>
Sender:	xen-users-bounces@xxxxxxxxxxxxxxxxxxx

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@xxxxxxxxxxxxx> 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 list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

WARNING - OLD ARCHIVES

xen-users

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