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[Xen-users] Re: compatibility problem with xen 3.1 and xen 3.3
- To: xen-users@xxxxxxxxxxxxxxxxxxx
- From: "Jia Rao" <rickenrao@xxxxxxxxx>
- Date: Wed, 8 Oct 2008 09:44:27 -0400
- Delivery-date: Wed, 08 Oct 2008 06:45:08 -0700
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anybody can help? On Tue, Oct 7, 2008 at 5:58 PM, Jia Rao <rickenrao@xxxxxxxxx> wrote:
Hi all,
I have several VMs created under xen 3.1. The VMs were created by copying file system in dom0 into domU. Everything was OK.
I just downloaded xen 3.3 and want to have a try. The xen 3.3 was compiled from source and dom0 was up with no problem.
When I copy the disk images to the new machine with xen 3.3. There is a problem with xm control command.
When I tried to change the number of VCPU in domU by using "xm vcpu-set domainID 2" there was a problem.
The domU was set to 4 VCPUs at start up. after I set VCPU to 2, the VCPU appears to be 3 in "xm list" and meanwhile, domU received following error:
Unable to handle kernel NULL pointer dereference at 0000000000000018 RIP:
[<ffffffff802185c2>] cacheinfo_cpu_callback+0x389/0x3f0
PGD 157e2067 PUD 0
Oops: 0002 [1] SMP
CPU 0
Modules linked in:
Pid: 2011, comm: xenwatch_cb Not tainted 2.6.18.8-xen #2
RIP: e030:[<ffffffff802185c2>] [<ffffffff802185c2>] cacheinfo_cpu_callback+0x389/0x3f0
RSP: e02b:ffff88001e2dbdb0 EFLAGS: 00010297
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffff88001f4b9b78 RDI: 0000000000000002
RBP: 0000000000000002 R08: 0000000000000007 R09: ffff88001f548578
R10: 0000000000000000 R11: ffffffff802b491c R12: ffff88001f4b9b60
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff80242c9d
FS: 00002aab51da7b80(0000) GS:ffffffff804d7000(0000) knlGS:0000000000000000
CS: e033 DS: 0000 ES: 0000
Process xenwatch_cb (pid: 2011, threadinfo ffff88001e2da000, task ffff88001f44d100)
Stack: ffff8800057550c0 0000000000000002 ffffffff80544308 ffffffff80242c57
ffff88000567e9e0 ffffffff80470940 0000000000000002 0000000000000007
0000000000000007 ffff880005767d80 ffffffff80242c9d ffffffff8023c9df
Call Trace:
[<ffffffff80242c57>] kthread_stop+0x75/0x79
[<ffffffff80242c9d>] keventd_create_kthread+0x0/0x61
[<ffffffff8023c9df>] notifier_call_chain+0x20/0x32
[<ffffffff8023cec4>] blocking_notifier_call_chain+0x22/0x36
[<ffffffff80248da4>] cpu_down+0x165/0x255
[<ffffffff8034ef8a>] vcpu_hotplug+0xb3/0xd1
[<ffffffff80226d55>] __wake_up_common+0x3e/0x68
[<ffffffff802eb70b>] strstr+0x4f/0x69
[<ffffffff803522ec>] xenwatch_handle_callback+0x0/0x48
[<ffffffff8034f08d>] handle_vcpu_hotplug_event+0x3a/0x3f
[<ffffffff80352301>] xenwatch_handle_callback+0x15/0x48
[<ffffffff80242f13>] kthread+0xd4/0x109
[<ffffffff8020afe0>] child_rip+0xa/0x12
[<ffffffff80242c9d>] keventd_create_kthread+0x0/0x61
[<ffffffff80242e3f>] kthread+0x0/0x109
[<ffffffff8020afd6>] child_rip+0x0/0x12
Code: f0 0f b3 68 18 49 8d 74 24 18 89 d7 e8 28 02 0d 00 83 f8 1f
RIP [<ffffffff802185c2>] cacheinfo_cpu_callback+0x389/0x3f0
RSP <ffff88001e2dbdb0>
CR2: 0000000000000018
There is nothing wrong in xm dmesg and xend.log
I thought there might be some compatiblity issue in xen 3.1 and xen 3.3. Then I recompile xen 3.3 within the VM, allowing the VM to have the same modules and kernels with the dom0. But it didnt work.
FYI:
OS: centOS 5.1
Kernel: 2.6.18-8
Xen: 3.3
CPU: two quad-core Intel cpu.
Box: Dell PowerEdge 1950
Thanks,
Jia
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