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I have a Debian Wheezy installation with Xen in kernel. All is fine but ... when I type a reboot command or shutdown -r now, my server is stuck and I see only that info on screen:

INFO: task reboot:15065 blocked for more than 120 seconds

I tried to change the kernel from wheezy to a kernel from backports - 3.10-0.bpo.2-amd64, but it doesn't help.

Do you have some idea why and what is the problem?

Thank you for help.



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You'd probably be better off asking on the Debian Forums. Sounds like some kind of bug. – Chris S Oct 2 '13 at 13:55
Maybe it is. But serverfault i think is good for that too. – Rafał Kamiński Oct 2 '13 at 14:03
What hardware do you have? I had a machine once that hung with messages similar to was the RAID controller. One firmware update later and it's worked fine since. – Nathan C Oct 2 '13 at 14:26
Does anything get written to your logs that is relevant ? – Iain Oct 2 '13 at 14:37
I have Dell PowerEdge r720xd wirh Raid controler. Hmm maybe i have to upgrade firmware raid. I've checked logs and only that i have in dmesg. – Rafał Kamiński Oct 2 '13 at 15:37

The log you provided indicates an I/O problem.

You can start looking at and testing it with vendor provided tools. It can be that this is not a hardware problem, but a Xen problem with insufficient I/O performance.

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