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Re: [Xen-users] Segmentation Fault

To: kashif.ali@xxxxxxxxxx
Subject: Re: [Xen-users] Segmentation Fault
From: Nico Kadel-Garcia <nkadel@xxxxxxxxx>
Date: Mon, 03 Sep 2007 13:57:03 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
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kashif.ali@xxxxxxxxxx wrote:
Hello,

I am running a server having 5 guest domains. Few days ago everything is
going fine but i needed to recompile the kernel of the guest domain (xenU)
for iptables supports in the kernel.

When i issued the command 'make menuconfig' the result is nothing but
segmentation fualt

I have run the memtest also but memtest is good. Now the situation is that
the system is not allowing me to compile, install or upgrade any thing,
even on cp or mv commands, the segmentation fault is coming.
Could your guest domain have been *hacked*, by a cracker? Can you shut down the Xen guest domain and do a "chroot" to the mounted file system, and see if anything works? Or are you running from

Also the xend service is not running, when i try to start this service the
system goes to waiting state and needed to stop the issued command.
Wait. xend runs only on the server, Dom0, not on DomU. Did you put the new kernel on Dom0, or are you using pygrub or its like to boot a local kernel on the guest domain?

Also on the boot the eth0 is not coming up. ifconfig is showing me only lo
interface. So every time it requires assigning the network settings (ips).
And when the network settings are applied, the eth0 came up and works.
This sounds like you compiled on top of and overwrite the system kernel on Dom0.



Any body has pointers to this problem. I have searched the mailing list
but not found any feasible solution.

The server has CentOS4.4 installed and also the guest domains.
The xen version is 'xen-3.0.2'
Well, upgrade to CentOS 4.5. then, stop compiling your own kernels unless you're comfortable with that sort of thing and stick with the Xensource CentOS 3.1,0 distribution for RHEL 4.

CPU info: Intel(R) Xeon(R)          E5320  @ 1.86GHz
12GB RAM

lspci command has the following output

00:00.0 Host bridge: Intel Corporation 5000P Chipset Memory Controller Hub
(rev b1)
00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8
Port 2-3 (rev b1)
00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8
Port 4-5 (rev b1)
00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8
Port 6-7 (rev b1)
00:10.0 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting
Registers (rev b1)
00:10.1 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting
Registers (rev b1)
00:10.2 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting
Registers (rev b1)
00:11.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved
Registers (rev b1)
00:13.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved
Registers (rev b1)
00:15.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers
(rev b1)
00:16.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers
(rev b1)
00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI
Express Root Port 1 (rev 09)
00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset
UHCI USB Controller #1 (rev 09)
00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset
UHCI USB Controller #2 (rev 09)
00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset
UHCI USB Controller #3 (rev 09)
00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset
EHCI USB2 Controller (rev 09)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC
Interface Controller (rev 09)
00:1f.1 IDE interface: Intel Corporation 631xESB/632xESB IDE Controller
(rev 09)
00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus
Controller (rev 09)
01:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream
Port (rev 01)
01:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X
Bridge (rev 01)
02:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express
Downstream Port E1 (rev 01)
02:02.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express
Downstream Port E3 (rev 01)
03:00.0 PCI bridge: Intel Corporation 6700PXH PCI Express-to-PCI Bridge A
(rev 09)
03:00.2 PCI bridge: Intel Corporation 6700PXH PCI Express-to-PCI Bridge B
(rev 09)
04:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169
Gigabit Ethernet (rev 10)
06:00.0 Ethernet controller: Intel Corporation 631xESB/632xESB DPT LAN
Controller Copper (rev 01)
06:00.1 Ethernet controller: Intel Corporation 631xESB/632xESB DPT LAN
Controller Copper (rev 01)
07:01.0 RAID bus controller: 3ware Inc 9550SX SATA-RAID
0b:01.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)

I have installed the xen from source not from the rpms.
All the hints will be greatly appreciated...

Thanking you,
Kashif
Use the RPM, and edit your own locally built grub.conf. Seriously.

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