Re: [Xen-users] Strange Halt during Xen boot

[Steven Timm <timm@xxxxxxxx>]

How is your grub.conf set up.. it may be that there are other
errors that are visible only on the serial console and not on tty0.
2.6.18-8 is a pretty old kernel for R710 architecture. the redhat/centos
built kernel with centos 5.5 allows for new hardware architectures like
Nehalem which the source that comes in 2.6.18-8 kernel might not.

I am running the stock xen and kernel that come with Sci.Linux 5.5
(another RH clone) which as others have mentioned is 3.1.2 even though
the rpm says 3.0.3.  Are there some 3.4 features that you need
that aren't in the stock xen/kernel.

Steve Timm


On Sat, 5 Feb 2011, Bill M wrote:

> Hi,
>
> I'm trying to get Xen 3.4.1 working on CentOS 5.5(64bit) for a Dell R710
> box(Quad Core Xeon "Nehalem" processor, 12 GB Memory and 2 Seagate SATA HDD).
> I followed the README to make world, make install, generate the
> corresponding ram disk with initrd, and modified /boot/menu.lst. I believe I
> didn't make any mistake through these steps, because I was able to get Xen
> 3.4.1 running on CentOS 5.5 for a Dell  Optiplex 745 box (Intel Core 2 Duo
> E6600, 2GB memory and 1 SATA HDD) with the same procedure.
>
> However, for the R710 box, once I reboot the server and boot with Xen, the
> system enters a halt that lasts forever, and all I got on the console was
> this:
>
> --------------------------------
> Booting command-list
>
> root (hd0,1)
> Filesystem type is ext2fs, partition type 0x83
> kernel /boot/xen.gz
>   [Multiboot-elf, <0x100000:0x11f770:0x6b890>, shtab=0x28b078,
> entry=0x100000]
> module /boot/vmlinuz-2.6.18.8-xen ro
> root=UUID=c25415f0-1eff-4b3e-a03b-99c3fecb
> be57 console=tty0 console=ttyS0,115200 selinux=0
>   [Multiboot-module @ 0x28c000, 0x73b340 bytes]
> module /boot/initrd-2.6.18.8-xen.img
>   [Multiboot-module @ 0x9c8000, 0x48ebc00 bytes]
> --------------------------------
>
> No error message at all... So my guess is that the system halts right after
> the grub loading. But, has the hypervisor booted? what causes the halt?
>
> I have tried three different ways to get Xen working on my R710 setup, but
> they all ended up with the same bizarre output.
> 1) Building from source for Xen 3.4.3, Xen 3.3.2, Xen 3.1.4;
> 2) Using yum to install binary for Xen 3.4.3, Xen 3.0.3 (the stock Xen comes
> with CentOS 5.5) (I came across a post here mentioning someone successfully
> get Xen 3.0.3 (CentOS 5.4) running on R710).
> 3) Building linux-2.6.18.8-xen with the existing CentOS kernel configuration
> file. I copied the existing configuration file into
> the build-linux-2.6.18-xen_x86_64 directory and followed the README on how
> to build the kernel with .config under the build-linux-2.6.18-xen_x86_64
> directory. For all remaining configure questions during compiling, I chose
> the default option.
>
> Up to this point, I'm totally clueless on how to solve this problem. Has
> anyone seen this problem before, or any insight to share? I would really
> appreciate the help.
>
> Thanks,
> --
> Bill
--
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@xxxxxxxx  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Group Leader.
Lead of FermiCloud project.

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