[Xen-users] xen unstable, smp, x64

[Thomas Schneider <etomsch@xxxxxxxxxx>]

Hi,

I've got a PentiumD System (Dual-Core) with EMT64 and am using Gentoo 64Bit 
on it. I tried xen-unstable on it with every combination of kernel-configs 
for dom0 and domU and can't get anything to work.
The error messages I get are in the dom0 when trying to start a domU:

Unable to handle kernel NULL pointer dereference at 0000000000000038 RIP:
<ffffffff801623b8>{generic_page_range+93}
PGD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in:
Pid: 5942, comm: kxbwatch Not tainted 2.6.12-xen0-br11
RIP: e030:[<ffffffff801623b8>] <ffffffff801623b8>{generic_page_range+93}
RSP: e02b:ffff88003a951468  EFLAGS: 00010202
RAX: 0000000000000c20 RBX: ffffc20000518000 RCX: 0000000000000068
RDX: 0000000000000000 RSI: ffffc20000518000 RDI: 0000000000000068
RBP: 00000000ba739000 R08: ffff88003a951530 R09: 0000000000000001
R10: 00000000000000a5 R11: 0000000000000202 R12: 0000000000001000
R13: ffff88003a951538 R14: 0000000000000001 R15: 0000000000000010
FS:  0000000000000000(0000) GS:ffffffff805b9680(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000
Process kxbwatch (pid: 5942, threadinfo ffff88003a950000, task 
ffff88003e41f6d0)
Stack: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
      0000000000000000 0000000000000000 ffffc20000519000 0000000000000c20
      ffff88003a951530 ffffffff801206c0
Call Trace:<ffffffff801206c0>{direct_remap_area_pte_fn+0} 
<ffffffff80120818>{__direct_remap_pfn_range+280}
      <ffffffff80352f1b>{ip_route_input+55} 
<ffffffff803ecdff>{ebt_do_table+1455}
      <ffffffff8034b87d>{nf_iterate+87} <ffffffff80356661>{ip_rcv_finish+0}
      <ffffffff803580c2>{ip_forward+648} <ffffffff80356d60>{ip_rcv+1150}
      <ffffffff803e7cf9>{br_pass_frame_up_finish+9} 
<ffffffff803e7d6b>{br_pass_frame_up+107}
      <ffffffff803eb57c>{br_nf_pre_routing_finish+885} 
<ffffffff8034b87d>{nf_iterate+87}
      <ffffffff803eb207>{br_nf_pre_routing_finish+0} 
<ffffffff803ebcf5>{br_nf_pre_routing+1827}
      <ffffffff80119ed9>{monotonic_clock+78} 
<ffffffff80403df9>{thread_return+0}
      <ffffffff80403e58>{thread_return+95} 
<ffffffff8034bc86>{nf_hook_slow+125}
      <ffffffff803e7d70>{br_handle_frame_finish+0} 
<ffffffff80119ed9>{monotonic_clock+78}
      <ffffffff80119ed9>{monotonic_clock+78} 
<ffffffff80403df9>{thread_return+0}
      <ffffffff80119ed9>{monotonic_clock+78} 
<ffffffff80403df9>{thread_return+0}
      <ffffffff80403e58>{thread_return+95} 
<ffffffff80403df9>{thread_return+0}
      <ffffffff80403e58>{thread_return+95} 
<ffffffff80119ed9>{monotonic_clock+78}
      <ffffffff80147e6a>{finish_wait+65} 
<ffffffff802d9775>{xs_input_avail+60}
      <ffffffff802d993c>{xb_read+440} 
<ffffffff80147eb1>{autoremove_wake_function+0}
      <ffffffff80244c79>{vsscanf+1596} <ffffffff80244d31>{sscanf+136}
      <ffffffff802d9c44>{xs_talkv+263} <ffffffff802d9cfd>{xs_single+62}
      <ffffffff802da4a2>{xenbus_gather+299} 
<ffffffff80117100>{xen_send_IPI_mask+255}
      <ffffffff8016a9de>{__get_vm_area+397} 
<ffffffff802deeb5>{netif_map+137}
      <ffffffff802de737>{frontend_changed+443} 
<ffffffff80147934>{keventd_create_kthread+0}
      <ffffffff802da893>{watch_thread+375} 
<ffffffff80147eb1>{autoremove_wake_function+0}
      <ffffffff80147eb1>{autoremove_wake_function+0} 
<ffffffff802da71c>{watch_thread+0}
      <ffffffff801478f9>{kthread+218} <ffffffff801128d7>{child_rip+8}
      <ffffffff80147934>{keventd_create_kthread+0} 
<ffffffff8014781f>{kthread+0}
      <ffffffff801128cf>{child_rip+0}

Code: 48 8b 52 38 48 89 4c 24 18 48 01 d0 48 89 44 24 38 e8 3a 2c
RIP <ffffffff801623b8>{generic_page_range+93} RSP <ffff88003a951468>
CR2: 0000000000000038

The domU complains with:
VFS: Cannot open root device "hda1" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(0,0)
after hangig a few seconds at:
xen_blk: Initialising virtual block device driver
xen_blk: Timeout connecting to device!

I can't get domU to work, does anyone know how to solve this? My domU 
config is following:
xen # cat infra
#  -*- mode: python; -*-
#---------------------------------------------------------------------------
# Kernel image file.
kernel = "/data/xen-kernels/vmlinuz-2.6.12-bU"
# Initial memory allocation (in megabytes) for the new domain.
memory = 512
# A name for your domain. All domains must have different names.
name = "infra"

# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
vif = [ 'mac=aa:00:00:00:00:11, bridge=xen-br0, 
script=/etc/xen/scripts/vif-bridge' ]
#disk = [ 'phy:loop0,hda1,w',
#         'phy:hda7,hda2,w' ]

disk = [ 'file:/data/images/xen_infra.img,hda1,w',
        'file:/data/images/xen_infraswap.img,hda2,w' ]
#, 'file:/export/xen/images/xen_infraswap.img,hda2,w' ]
#        'phy:hda7,hda2,w' ]
# Set root device.
root = "/dev/hda1"
#===========================================================================

xend.log:
[2005-09-21 13:42:11 xend] DEBUG (image:164) initDomain: cpu=-1 
mem_kb=524288 ssidref=0 dom=1
[2005-09-21 13:42:11 xend] DEBUG (XendDomainInfo:702) init_domain> Created 
domain=1 name=infra memory=512
[2005-09-21 13:42:12 xend] INFO (image:202) buildDomain os=linux dom=1 
vcpus=1
[2005-09-21 13:42:12 xend] DEBUG (image:246) dom            = 1
[2005-09-21 13:42:12 xend] DEBUG (image:247) image          = 
/data/xen-kernels/vmlinuz-2.6.12-bU
[2005-09-21 13:42:12 xend] DEBUG (image:248) store_evtchn   = 1
[2005-09-21 13:42:12 xend] DEBUG (image:249) console_evtchn = 2
[2005-09-21 13:42:12 xend] DEBUG (image:250) cmdline        = 
root=/dev/hda1
[2005-09-21 13:42:12 xend] DEBUG (image:251) ramdisk        =
[2005-09-21 13:42:12 xend] DEBUG (image:252) flags          = 0
[2005-09-21 13:42:12 xend] DEBUG (image:253) vcpus          = 1
[2005-09-21 13:42:12 xend] DEBUG (DevController:181) DevController: writing 
{'virtual-device': '769', 'backend-id': '0', 'backend': 
'/domain/3b5ed18d-3032-458c-a2af-42741fb242f5/backend/vbd/06badfb5-b04b-40d3-aa06-828ff25d5972/769'} 
to /domain/06badfb5-b04b-40d3-aa06-828ff25d5972/device/vbd/769.
[2005-09-21 13:42:12 xend] DEBUG (DevController:183) DevController: writing 
{'params': '/data/images/xen_infra.img', 'domain': 'infra', 'type': 'file', 
'frontend': '/domain/06badfb5-b04b-40d3-aa06-828ff25d5972/device/vbd/769', 
'frontend-id': '1'} to 
/domain/3b5ed18d-3032-458c-a2af-42741fb242f5/backend/vbd/06badfb5-b04b-40d3-aa06-828ff25d5972/769.
[2005-09-21 13:42:12 xend] DEBUG (DevController:181) DevController: writing 
{'virtual-device': '770', 'backend-id': '0', 'backend': 
'/domain/3b5ed18d-3032-458c-a2af-42741fb242f5/backend/vbd/06badfb5-b04b-40d3-aa06-828ff25d5972/770'} 
to /domain/06badfb5-b04b-40d3-aa06-828ff25d5972/device/vbd/770.
[2005-09-21 13:42:12 xend] DEBUG (DevController:183) DevController: writing 
{'params': '/data/images/xen_infraswap.img', 'domain': 'infra', 'type': 
'file', 'frontend': 
'/domain/06badfb5-b04b-40d3-aa06-828ff25d5972/device/vbd/770', 
'frontend-id': '1'} to 
/domain/3b5ed18d-3032-458c-a2af-42741fb242f5/backend/vbd/06badfb5-b04b-40d3-aa06-828ff25d5972/770.
[2005-09-21 13:42:12 xend] DEBUG (DevController:181) DevController: writing 
{'backend-id': '0', 'mac': 'aa:00:00:00:00:11', 'handle': '1', 'backend': 
'/domain/3b5ed18d-3032-458c-a2af-42741fb242f5/backend/vif/06badfb5-b04b-40d3-aa06-828ff25d5972/1'} 
to /domain/06badfb5-b04b-40d3-aa06-828ff25d5972/device/vif/1.
[2005-09-21 13:42:12 xend] DEBUG (DevController:183) DevController: writing 
{'bridge': 'xen-br0', 'mac': 'aa:00:00:00:00:11', 'handle': '1', 'script': 
'/etc/xen/scripts/vif-bridge', 'frontend-id': '1', 'domain': 'infra', 
'frontend': '/domain/06badfb5-b04b-40d3-aa06-828ff25d5972/device/vif/1'} to 
/domain/3b5ed18d-3032-458c-a2af-42741fb242f5/backend/vif/06badfb5-b04b-40d3-aa06-828ff25d5972/1.
[2005-09-21 13:42:12 xend] INFO (XendRoot:141) EVENT> xend.domain.create 
['infra', 1]
[2005-09-21 13:42:12 xend] INFO (XendRoot:141) EVENT> xend.domain.unpause 
['infra', 1]
[2005-09-21 14:03:58 xend] DEBUG (XendDomain:467) domain_restart_schedule> 
1 halt 1
[2005-09-21 14:03:58 xend] INFO (XendDomain:481) Cancelling restart for 
domain: name=infra id=1
[2005-09-21 14:03:58 xend] INFO (XendRoot:141) EVENT> xend.domain.restart 
['infra', 1, 'cancel']
[2005-09-21 14:03:58 xend] INFO (XendRoot:141) EVENT> xend.domain.died 
['infra', None]

Thanks for your help,

Greetings,

Tom

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