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Re: [Xen-devel] [PATCH] Fix buildsystem to detect udev > version 124

To: Jun Koi <junkoi2004@xxxxxxxxx>, "Marc - A. Dahlhaus \[ Administration | Westermann GmbH \]" <mad@xxxxxx>

From: Boris Derzhavets <bderzhavets@xxxxxxxxx>

Date: Thu, 25 Jun 2009 20:11:27 -0700 (PDT)

Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>

Delivery-date: Thu, 25 Jun 2009 20:12:00 -0700

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List-id: Xen developer discussion <xen-devel.lists.xensource.com>

> I am not sure if I downgrade Ubuntu to 8.10 would solve the problem.
> This is really frustrated!
It would solve the problem with 2.6.30-rc6(3)-tip pvops kernel or
2.6.29.4 xen-ified per Suse (2.6.27 XCI as well)

Boris.

--- On Thu, 6/25/09, Marc - A. Dahlhaus [ Administration | Westermann GmbH ] <mad@xxxxxx> wrote:

From: Marc - A. Dahlhaus [ Administration | Westermann GmbH ] <mad@xxxxxx>
Subject: Re: [Xen-devel] [PATCH] Fix buildsystem to detect udev > version 124
To: "Jun Koi" <junkoi2004@xxxxxxxxx>
Cc: "Xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Date: Thursday, June 25, 2009, 3:39 AM

Hello Jun,

(adding list back to CC)

Am Donnerstag, den 25.06.2009, 16:27 +0900 schrieb Jun Koi:
> On Thu, Jun 25, 2009 at 4:24 PM, Marc - A. Dahlhaus [ Administration |
> Westermann GmbH ]<mad@xxxxxx> wrote:
> > Hello Jun,
> >
> > Am Donnerstag, den 25.06.2009, 14:10 +0900 schrieb Jun Koi:
> >> On Thu, Jun 25, 2009 at 1:26 AM, Marc - A. Dahlhaus [ Administration |
> >> Westermann GmbH ]<mad@xxxxxx> wrote:
> >> > udev removed the udevinfo symlink from versions higher than 123 and xens
> >> > build-system could not detect if udev is in place and has the required
> >> > version. Attached patch fixes this.
> >>
> >> I am building xen-3.4-test tree on Ubuntu 9.04. Booting process
> >> reports error like:
> >>
> >> ....
> >> udev: starting version 141
> >> udev: deprecated sysfs layout; update the kernel or disable
> >> CONFIG_SYSFS_DEPRECATED;....
> >> ....
> >>
> >> Is that true that your patch is to fix this problem?
> >
> > No!
> >
> > What you hit here is a deprecated sysfs layout of your running kernel
> > that udev will not support for some functionality it has. You need to
> > upgrade to a newer kernel to get around this error. Please read udevs
> > documentation for more details about this...
> >
>
> Yes, but the problem is that I want to run 2.6.18.8-xen kernel :-(
>
> I am not sure if I downgrade Ubuntu to 8.10 would solve the problem.
> This is really frustrated!
>
> Thanks,
> J

You could downgrade your udev or upgrade your kernel (which i would
prefer here) but i doubt that you really need the functionality that
udev only gets out of newer sysfs layouts.

By the way, the warning doesn't hurt at this point as your system runs
fine...

Just keep in mind that 2.6.18 kernel is stoneaged and that a newer
kernel would get around this warning.

have fun,

Marc

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