From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jia Rao Subject: Problems with xen and linux 2.26.32 kernels for dom0 Date: Wed, 16 Jun 2010 15:00:03 -0400 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1997492041==" Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org --===============1997492041== Content-Type: multipart/alternative; boundary=0015175cd1685fab0d04892a5429 --0015175cd1685fab0d04892a5429 Content-Type: text/plain; charset=ISO-8859-1 Hi all, I used to use xen 3.4.2 and linux 2.6.18-xen kernels for both dom0 and domU, without any problems. Recently, I need to try io bandwidth control like dm-ioband in the new kernel 2.6.32 (dm-ioband has patches for this kernel). It gave me a lot of problems if I want to upgrade the dom0 to 2.6.32. The following is what I tried and the errors. Xen: 3.4.3 (I need to stick with 3.4.x. 3.4.3 is the one that can run pvops) *First approach:* I tried to download pvops from the git repository xen/stable-2.6.32.x. The compilation was OK, but the initrd has a lot missing dependencies. I tried to use --builtin to claim those missing modules in kernel. However, with the generated initrd, dom0 can not boot. I got the error: *unable to locate IOAPIC for GSIx and mount: could not find filesystem: /dev/root*. I enabled : CONFIG_SYSFS_DEPRECATED=y, CONFIG_SYSFS_DEPRECATED_V2=y and tried to use root=/dev/sdax or root=LABEL=/. No luck. *Second approach:* Then I switched to the forward ported 2.6.32.13 kernel generated from the gentoo xen kernel patches. Still xen 3.4.3. After compilation, dom0 booted successfully. However I previous domU which has 2.6.18-xen kernels can not boot. It has the same error: *mount: could not find filesystem: /dev/root *Do I need to create a initrd for the domU? I didnt need one when dom0 is 2.6.18-xen kernel. * *BTW. I dont see a PARAVIRT_GUEST config option in the forward ported 2.6.32 kernel*. *Any ideas? Thanks in advance!* * --0015175cd1685fab0d04892a5429 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi all,

I used to use xen 3.4.2 and linux 2.6.18-xen kernels for bot= h dom0 and domU, without any problems.

Recently, I need to try io bandwidth control like dm-ioband in the new kernel 2.6.32 (dm-ioband has patches for this kernel). It gave me a lot of problems if I want to upgrade the dom0 to 2.6.32. The following is what I tried and the errors.


Xen: 3.4.3 (I need to stick with 3.4.x. 3.4.3 is the one that can r= un pvops)

First approach:
I tried to download pvops from the git repository xen/stable-2.6.32.x. The compilation was OK, but the initrd has a lot missing dependencies. I tried to use --builtin to claim those missing modules in kernel. However, with the generated initrd, dom0 can not boot. I got the error: unable to locate IOAPIC for GSIx and mount: could not find filesystem: /= dev/root.
I enabled : CONFIG_SYSFS_DEPRECATED=3Dy,=A0 CONFIG_SYSFS_DEPRE= CATED_V2=3Dy and tried to use root=3D/dev/sdax or root=3DLABEL=3D/. No luck= .

Second approach:
Then I switched to the forward ported 2.6.32= .13 kernel generated from the gentoo xen kernel patches.

Still xen 3.4.3. After compilation, dom0 booted successfully. However I previous domU which has 2.6.18-xen kernels can not boot. It has the same error: mount: could not find filesystem: /dev/root
Do I need to create a initrd for the domU? I didnt need one when dom0 i= s 2.6.18-xen kernel.

BTW. I dont see a PARAVIRT_GUEST config = option in the forward ported 2.6.32 kernel.

Any ideas?
Thanks in advance!
 --0015175cd1685fab0d04892a5429-- --===============1997492041== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel --===============1997492041==--