WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Problems with xen and linux 2.26.32 kernels for dom0

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Problems with xen and linux 2.26.32 kernels for dom0
From: Jia Rao <rickenrao@xxxxxxxxx>
Date: Wed, 16 Jun 2010 17:06:04 -0400
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Wed, 16 Jun 2010 14:07:44 -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=T06EcNs0CBNW8/dqTsdkHC1d9osTqdOwPbCPhYo0pBs=; b=d37TaCt3eh41glQpWhH8dG27Qft5/mvgy0ziRDyPLSh9pTSzgOou2JsbJVU2Wy5Ilj mmfuVTFwQW+NlnxCNLdJXqU/a1GiFaR2UDYBfXRYkt3oF9Ak15gRAGV/B2jLt1eb4fag jR35G4CCUlEI0pBMCXYYMWrIPXlsJNAGkVwTA=
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=nb+bSW9hrigY6nsbUz0vzifQBY+v0oN8a24H7WqS/fj6DleKCCUf8Wdyzq47NKmfRx yE5lT/oqKiHIm/a4VcE44u0VFhQtebImv6TuGOHaMD8Ff3jKQ4l9W1RHNhQvKL+AYGXZ SiV2KPCZ2rqhhJXOlLcBPyCoPhN02h24Ea0ik=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20100616194310.GB8413@xxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <AANLkTilUPKPuECSWT_ySDkKfdLs5OPwlzFnW5Op6_SSd@xxxxxxxxxxxxxx> <20100616194310.GB8413@xxxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx


On Wed, Jun 16, 2010 at 3:43 PM, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
On Wed, Jun 16, 2010 at 03:00:03PM -0400, Jia Rao wrote:
> 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.

You did follow the the Wiki:
http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher

and made sure you had the right SATA drivers compiled in? They changed
their names from .18 to .31-and-higher
>
 
I tried the script with the pvops, the dom0 still cannt boot. How can I check if other modules have changed the name besides ata_piix ?
 
> *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.

That is perplexing. If you did not change anything in your DomU it
should work as before.

The same domU booted correctly under an old dom0 which has a 2.6.18.8-xen kernel. BTW the domU booted using pygrub, so it should work under the new kernel. It is really strange.
> *
> *BTW. I dont see a PARAVIRT_GUEST config option in the forward ported 2.6.32
> kernel*.

Right. You won't. They are a different type of patches.

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