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Lots of questions this week,

I got this error on dom0, then the server crashed (according to /var/log/messages):

Jun 22 10:02:09 453 dhcpd: DHCPACK to (xx:xx:xx:xx:xx:xx) via eth0
Jun 22 10:02:10 453 kernel: list_add corruption. prev->next should be ffff880007b111d8, but was ffff880007b01218
Jun 22 10:02:10 453 kernel: ----------- [cut here ] --------- [please bite here ] ---------
Jun 22 10:02:10 453 kernel: Kernel BUG at lib/list_debug.c:31
Jun 22 10:02:10 453 kernel: invalid opcode: 0000 [1] SMP
Jun 22 10:02:10 453 kernel: last sysfs file: /devices/xen-backend/vbd-2-2049/statistics/wr_sect

Server is on CentOS 5.8

title CentOS (2.6.18-274.17.1.el5xen)
        root (hd0,0)
        kernel /boot/xen.gz-4.1.1 dom0_mem=2048m pci=nomsi
        module /boot/vmlinuz-2.6.18-274.17.1.el5xen ro root=LABEL=/ pci=nomsi
        module /boot/initrd-2.6.18-274.17.1.el5xen.img
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Are you using some dodgy devices like USB? – Andrew Smith Jun 22 '12 at 11:28
We have a KVM connected to it. It has been there for several months. I have rebooted the server with irqpoll added to grub.conf. – JohnT Jun 22 '12 at 11:55

First - why are you using your Dom0 as DHCP-server?

Second - looks like a memory fault to me.

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