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Re: [Xen-users] Help with system

Subject: Re: [Xen-users] Help with system
From: "Nuno L. Ferreira" <nunolf@xxxxxxxxx>
Date: Mon, 05 Apr 2010 15:43:51 +0200
Cc: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
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Olá Gilberto,

Not going to help much ... just to give some feedback.
I never saw that error, and I just installed a CentOS 54 x86_64 on a Quad AMD server (it installs xen 3.0.3, aka xen 3.1.2 or something) but I do not remember to have that error. I'm now with xen 3.4.2, and from xend.log I cannot see that BUG error.

The only think I notice different from what I'm used to see is your kernel : I have 2.6.18-164.15.1.el5xen, you have 2.6.18-164.15.1.el5.*centos.plusxen* I expect that if you install a from a CentOS repo you will get the same kernel as me, but I'm wrong then.

Cheers,
N.

Gilberto Nunes wrote:
Hi...

I have install CentOS 5.4 with Xen 3.0.3...

I get this message from kernel:

Apr 5 09:59:14 zebra kernel: BUG: warning at lib/kref.c:32/kref_get() (Not tainted)
Apr  5 09:59:14 zebra kernel:
Apr  5 09:59:14 zebra kernel: Call Trace:
Apr  5 09:59:14 zebra kernel:  [<ffffffff8023824d>] kref_get+0x38/0x3d
Apr  5 09:59:14 zebra kernel:  [<ffffffff8025a440>] kobject_get+0x12/0x17
Apr 5 09:59:14 zebra kernel: [<ffffffff8024b57f>] blk_get_queue+0x1f/0x26 Apr 5 09:59:14 zebra kernel: [<ffffffff887198f7>] :blkbk:dispatch_rw_block_io+0x4db/0x5a2
Apr  5 09:59:14 zebra kernel:  [<ffffffff80340368>] __next_cpu+0x19/0x28
Apr 5 09:59:14 zebra kernel: [<ffffffff8028792a>] find_busiest_group+0x1db/0x44d Apr 5 09:59:14 zebra kernel: [<ffffffff802883c0>] dequeue_task+0x18/0x37 Apr 5 09:59:14 zebra kernel: [<ffffffff80288407>] deactivate_task+0x28/0x5f Apr 5 09:59:14 zebra kernel: [<ffffffff8026ef47>] monotonic_clock+0x35/0x7b Apr 5 09:59:14 zebra kernel: [<ffffffff80262dd3>] thread_return+0x6c/0x113 Apr 5 09:59:14 zebra kernel: [<ffffffff80340af5>] kobject_cleanup+0x39/0x7e Apr 5 09:59:14 zebra kernel: [<ffffffff88719d2c>] :blkbk:blkif_schedule+0x36e/0x456 Apr 5 09:59:14 zebra kernel: [<ffffffff887199be>] :blkbk:blkif_schedule+0x0/0x456 Apr 5 09:59:14 zebra kernel: [<ffffffff8029bdab>] keventd_create_kthread+0x0/0xc4
Apr  5 09:59:14 zebra kernel:  [<ffffffff80233bef>] kthread+0xfe/0x132
Apr  5 09:59:14 zebra kernel:  [<ffffffff80260b2c>] child_rip+0xa/0x12
Apr 5 09:59:14 zebra kernel: [<ffffffff8029bdab>] keventd_create_kthread+0x0/0xc4
Apr  5 09:59:14 zebra kernel:  [<ffffffff80233af1>] kthread+0x0/0x132
Apr  5 09:59:14 zebra kernel:  [<ffffffff80260b22>] child_rip+0x0/0x12
Apr  5 09:59:14 zebra kernel:

I do not know if this is a Xen Bug or CentOS or a Kernel BUG...

I use this kernel: 2.6.18-164.15.1.el5.centos.plusxen #1 SMP Wed Mar 17 20:32:20 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

But doesn't matter what kernel I use come from CentOS mirror with xen support...
I allways get that kernel message....

Somebody already have thi problem too???

Thanks for any advice...


--
==============================================
Nuno Ricardo Santos Loureiro da Silva Ferreira

NMR Spectroscopy Research Group
Bijvoet Center for Biomolecular Research
Utrecht University
Bloembergen gebouw
Padualaan 8, 3584 CH Utrecht
The Netherlands

P: +31.(0)30.253 9932
F: +31.(0)30.253 2652
E: n.l.ferreira@xxxxx
W: http://nmr.chem.uu.nl
==============================================


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