Re: [Xen-users] Current 2.6.3x kernel and patches for Ubuntu 9.04?

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

Quote:-

> On Thu, Aug 6, 2009 at 12:18 PM, James
> Dingwall<james.dingwall@xxxxxxxxxx> wrote:
> >
> >>> To be honest 2.6.29 is the best one to use at the moment, 2.6.30
> has
> >>> issues with networking which I've not been able to fix, also
> opensuse
> >>> have selected 2.6.31 as their next distro kernel so I plan to
> rebase
> >>> that as soon as it is released and to put more effort into
> supporting
> >>> it, they have already moved to the 2.6.31-rcX tree so 2.6.30 is
> dead
> >>> as far as opensuse are concerned, that makes it much harder for me
> to
> >>> support.
> >
> > Out of interest what networking issues have you seen?  I am using
> > 2.6.30-xen-r1 and I lose connectivity to my domUs occasionally.  It
> > seems to happen under heavy disk/network I/O.  I've not isolated to
> > either in particular but when it seems to coincide with lots of NFS
> or
> > rsync activity.  e.g. my gentoo domUs are doing an rsync of the
> portage
> > tree from the dom0 or doing an emerge where distfiles and the ccache
> are
> > mounted by NFS from dom0.  There is nothing in the logs on the domU
> or
> > dom0 except from NFS timeout messages.  I did try -r2 but I just get
> > immediate reboots when xen is relinquishing the vga console.  Going
> to
> > reboot with 2.6.29 later to see if I still get the same behaviour.
> >
> > Thanks,
> > James
> >
> > This message and the information contained herein is proprietary and
> confidential and subject to the Amdocs policy statement,
> > you may review at http://www.amdocs.com/email_disclaimer.asp
> >
>
> The networking problems I've had with 2.6.30 are malformed packets
> being sent to the domU, see the last few posts in this thread for
> details http://forums.gentoo.org/viewtopic.php?p=5915696#5915696

FWIW I seem to have solved the network problems I was experiencing by changing the following .config options in the kernel:

# CONFIG_XEN_COMPAT_030002_AND_LATER is not set
# CONFIG_XEN_COMPAT_030004_AND_LATER is not set
# CONFIG_XEN_COMPAT_030100_AND_LATER is not set
# CONFIG_XEN_COMPAT_030200_AND_LATER is not set
# CONFIG_XEN_COMPAT_030300_AND_LATER is not set
CONFIG_XEN_COMPAT_LATEST_ONLY=y

(Was CONFIG_XEN_COMPAT_030002_AND_LATER=y)

CONFIG_XEN_NETDEV_TX_SHIFT=10

(Was CONFIG_XEN_NETDEV_TX_SHIFT=8)

James


--- On Fri, 8/28/09, Bruce Edge <bruce.edge@xxxxxxxxx> wrote:

From: Bruce Edge <bruce.edge@xxxxxxxxx>
Subject: Re: [Xen-users] Current 2.6.3x kernel and patches for Ubuntu 9.04?
To: xen-users@xxxxxxxxxxxxxxxxxxx
Date: Friday, August 28, 2009, 6:27 PM

On Fri, Aug 28, 2009 at 1:49 PM, Thiago Camargo Martins Cordeiro <thiagocmartinsc@xxxxxxxxx> wrote:

That's what I want! FUN!

GEM = Graphics Execution Memory

KMS = Kernel Mode-Setting

 This couple is the new video drivers for Linux from Intel, the X doesn't need to be SUID root anymore and, the framebuffer for Linux since 2.6.29 it's now fully accelerated, even if on top of Xen!

 So, that's what I want, a pvops dom0 with full video acceleration!

Cheers!

Thiago

2009/8/28 Boris Derzhavets <bderzhavets@xxxxxxxxx>

What is  GEM/KMS  ?
Actually, 2.6.30 is good only for fun, 2.6.29.6 for work.

Why is 2.6.30 no good for real work?

What type of problems are there?

We need a 2.6.30 kernel for support for our i7 chip's hyperthreading. We're trying to get some benchmarks on top of Xen and the older kernels are abysmal for our app as it cuts down on the number of cores that the app sees by a factor of 2 due to the lack of nehalem hyperthreading support in pre-2.6.30.

-Bruce
 

PVOPS kernel  requires LAN for VNC connections. :(

Boris.

--- On Fri, 8/28/09, Thiago Camargo Martins Cordeiro <thiagocmartinsc@xxxxxxxxx> wrote:

From: Thiago Camargo Martins Cordeiro <thiagocmartinsc@xxxxxxxxx>
Subject: Re: [Xen-users] Current 2.6.3x kernel and patches for Ubuntu 9.04?
To: "dbaxps" <bderzhavets@xxxxxxxxx>
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Date: Friday, August 28, 2009, 12:39 PM

Cool! i have read this yesterday!  :-D

I'm trying to boot the Xen 3.5 with the Linux 2.3.60 compiled with GEM/KMS in my Karmic Desktop but... Grub 2 is to new for me! haha!

2009/8/28 dbaxps <bderzhavets@xxxxxxxxx>

View , regarding Xen 3.4.1 Dom0 on top of Ubuntu 9.04 Server with pvops
enabled kernel :-

http://bderzhavets.wordpress.com/2009/06/25/setup-xen-3-4-1-dom0-on-top-of-ubuntu-9-04-server-via-marc-a-dahlhauss-udev-patch/

Boris

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