[Fedora-xen] i386 domU on x86_64 dom0

Ask Bjørn Hansen ask at develooper.com
Tue Aug 7 10:18:03 UTC 2007 

Hi everyone,

Most of our virtual machines could happily be i386 (and save a bit of  
memory).   I prefer the dom0s to be x86_64 for some added flexibility  
for applications that do need 64bit (MySQL, memcached, varnish).

I upgraded one of our boxes to F7 to get Xen 3.1 since it's supposed  
to be possible there.  But it crashes pretty fast every time.  I am  
running the latest kernel and xen in the dom0 and just the release  
tree in the domU.

Any ideas?

    - ask

Freeing unused kernel memory: 180k freed
Write protecting the kernel read-only data: 762k
Oops: 0000 [#1]
SMP
last sysfs file: /class/graphics/fb0/name
Modules linked in: xenblk xennet iscsi_tcp libiscsi  
scsi_transport_iscsi sr_mod sd_mod scsi_mod cdrom ipv6 ext2 ext3  
mbcache jbd squashfs pcspkr loop nfs nfs_acl lockd sunrpc vfat fat  
cramfs
CPU:    0
EIP:    0061:[<ee33d9d3>]    Not tainted VLI
EFLAGS: 00010097   (2.6.20-2925.9.fc7xen #1)
EIP is at blkif_int+0x105/0x18c [xenblk]
eax: 00000000   ebx: c252e000   ecx: c02d1550   edx: 00000000
esi: 00000001   edi: ed6b40ac   ebp: c135ffc8   esp: c135ff9c
ds: 007b   es: 007b   ss: 0069
Process init (pid: 243, ti=c135f000 task=c02d1550 task.ti=c1cb0000)
Stack: 00000000 c135ffc8 00000000 00000001 00000002 00000001 ca000100  
da537c5c
        ed78f580 00000000 00000000 c135ffe0 c1048ee9 0000010e  
c12fdb00 0000010e
        ed78f580 c135fff8 c104a2e4 c12fdb28 c1cb0e84 0000010e  
c104a24a c1cb0ea0
Call Trace:
[<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
[<c1005e4e>] show_stack_log_lvl+0x9b/0xa3
[<c1005fea>] show_registers+0x194/0x26a
[<c10061f1>] die+0x131/0x246
[<c11f9831>] do_page_fault+0xafc/0xc80
[<c11f7b25>] error_code+0x35/0x3c
[<c1048ee9>] handle_IRQ_event+0x1a/0x4a
[<c104a2e4>] handle_level_irq+0x9a/0xea
[<c10070a8>] do_IRQ+0xc6/0xee
[<c11472fa>] evtchn_do_upcall+0x62/0x9b
[<c100575a>] hypervisor_callback+0x46/0x50
[<c1017c26>] raw_local_irq_enable+0x20/0x22
[<c11f7557>] _spin_unlock_irq+0x27/0x2a
[<c101fcce>] do_syslog+0x122/0x30e
[<c10a33f2>] kmsg_read+0x34/0x3c
[<c106e0ac>] vfs_read+0xad/0x161
[<c106e538>] sys_read+0x3d/0x61
[<c1005568>] syscall_call+0x7/0xb
=======================
Code: ff c7 04 24 58 e5 33 ee 83 c0 0c 89 44 24 04 e8 5c 20 ce d2 89  
d8 c7 83 e0 13 00 00 00 00 00 00 e8 87 05 00 00 8b 55 dc 8b 45 dc  
<8b> 4a 30 89 f2 e8 98 02 d9 d2 85 c0 74 04 0f 0b eb fe 8b 45 dc
EIP: [<ee33d9d3>] blkif_int+0x105/0x18c [xenblk] SS:ESP 0069:c135ff9c
<0>Kernel panic - not syncing: Fatal exception in interrupt
BUG: at arch/i386/kernel/smp-xen.c:530 smp_call_function()
[<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
[<c1006347>] show_trace+0x12/0x14
[<c10063c2>] dump_stack+0x16/0x18
[<c100fbcc>] smp_call_function+0x60/0xfb
[<c100fc85>] smp_send_stop+0x1e/0x34
[<c101eed8>] panic+0x54/0x188
[<c10062d1>] die+0x211/0x246
[<c11f9831>] do_page_fault+0xafc/0xc80
[<c11f7b25>] error_code+0x35/0x3c
[<c1048ee9>] handle_IRQ_event+0x1a/0x4a
[<c104a2e4>] handle_level_irq+0x9a/0xea
[<c10070a8>] do_IRQ+0xc6/0xee
[<c11472fa>] evtchn_do_upcall+0x62/0x9b
[<c100575a>] hypervisor_callback+0x46/0x50
[<c1017c26>] raw_local_irq_enable+0x20/0x22
[<c11f7557>] _spin_unlock_irq+0x27/0x2a
[<c101fcce>] do_syslog+0x122/0x30e
[<c10a33f2>] kmsg_read+0x34/0x3c
[<c106e0ac>] vfs_read+0xad/0x161
[<c106e538>] sys_read+0x3d/0x61
[<c1005568>] syscall_call+0x7/0xb
=======================


[....]

drivers/usb/input/hid-core.c: v2.6:USB HID core driver
BUG: at kernel/fork.c:994 copy_process()
[<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
[<c1006347>] show_trace+0x12/0x14
[<c10063c2>] dump_stack+0x16/0x18
[<c101d040>] copy_process+0x195/0x1245
[<c101e140>] do_fork+0x50/0x117
[<c1003351>] kernel_thread+0x8e/0x96
[<c102c6fd>] __call_usermodehelper+0x2d/0x46
[<c102cd4b>] run_workqueue+0x89/0x145
[<c102d70d>] worker_thread+0xd5/0x102
[<c102ff23>] kthread+0xb3/0xdc
[<c10058df>] kernel_thread_helper+0x7/0x10
=======================
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
TCP bic registered
Initializing XFRM netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
Using IPI No-Shortcut mode
XENBUS: Device with no driver: device/vbd/51712
XENBUS: Device with no driver: device/vif/0
Freeing unused kernel memory: 180k freed
Write protecting the kernel read-only data: 762k
Oops: 0000 [#1]
SMP
last sysfs file: /class/graphics/fb0/name
Modules linked in: xenblk xennet iscsi_tcp libiscsi  
scsi_transport_iscsi sr_mod sd_mod scsi_mod cdrom ipv6 ext2 ext3  
mbcache jbd squashfs pcspkr loop nfs nfs_acl lockd sunrpc vfat fat  
cramfs
CPU:    0
EIP:    0061:[<ee33d9d3>]    Not tainted VLI
EFLAGS: 00010097   (2.6.20-2925.9.fc7xen #1)
EIP is at blkif_int+0x105/0x18c [xenblk]
eax: 00000000   ebx: c252e000   ecx: 00000000   edx: 00000000
esi: 00000001   edi: ed6e20ac   ebp: c135ffc8   esp: c135ff9c
ds: 007b   es: 007b   ss: 0069
Process init (pid: 243, ti=c135f000 task=c02ce030 task.ti=c1cb0000)
Stack: 00000000 c135ffc8 00000000 00000001 00000002 00000001 ca000100  
da537c5c
        c1cd84a0 00000000 00000000 c135ffe0 c1048ee9 0000010e  
c12fdb00 0000010e
        c1cd84a0 c135fff8 c104a2e4 c12fdb28 c1cb0e84 0000010e  
c104a24a c1cb0ea0
Call Trace:
[<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
[<c1005e4e>] show_stack_log_lvl+0x9b/0xa3
[<c1005fea>] show_registers+0x194/0x26a
[<c10061f1>] die+0x131/0x246
[<c11f9831>] do_page_fault+0xafc/0xc80
[<c11f7b25>] error_code+0x35/0x3c
[<c1048ee9>] handle_IRQ_event+0x1a/0x4a
[<c104a2e4>] handle_level_irq+0x9a/0xea
[<c10070a8>] do_IRQ+0xc6/0xee
[<c11472fa>] evtchn_do_upcall+0x62/0x9b
[<c100575a>] hypervisor_callback+0x46/0x50
[<c1017c26>] raw_local_irq_enable+0x20/0x22
[<c11f7557>] _spin_unlock_irq+0x27/0x2a
[<c101fcce>] do_syslog+0x122/0x30e
[<c10a33f2>] kmsg_read+0x34/0x3c
[<c106e0ac>] vfs_read+0xad/0x161
[<c106e538>] sys_read+0x3d/0x61
[<c1005568>] syscall_call+0x7/0xb
=======================
Code: ff c7 04 24 58 e5 33 ee 83 c0 0c 89 44 24 04 e8 5c 20 ce d2 89  
d8 c7 83 e0 13 00 00 00 00 00 00 e8 87 05 00 00 8b 55 dc 8b 45 dc  
<8b> 4a 30 89 f2 e8 98 02 d9 d2 85 c0 74 04 0f 0b eb fe 8b 45 dc
EIP: [<ee33d9d3>] blkif_int+0x105/0x18c [xenblk] SS:ESP 0069:c135ff9c
<0>Kernel panic - not syncing: Fatal exception in interrupt
BUG: at arch/i386/kernel/smp-xen.c:530 smp_call_function()
[<c1005d9e>] show_trace_log_lvl+0x1a/0x2f
[<c1006347>] show_trace+0x12/0x14
[<c10063c2>] dump_stack+0x16/0x18
[<c100fbcc>] smp_call_function+0x60/0xfb
[<c100fc85>] smp_send_stop+0x1e/0x34
[<c101eed8>] panic+0x54/0x188
[<c10062d1>] die+0x211/0x246
[<c11f9831>] do_page_fault+0xafc/0xc80
[<c11f7b25>] error_code+0x35/0x3c
[<c1048ee9>] handle_IRQ_event+0x1a/0x4a
[<c104a2e4>] handle_level_irq+0x9a/0xea
[<c10070a8>] do_IRQ+0xc6/0xee
[<c11472fa>] evtchn_do_upcall+0x62/0x9b
[<c100575a>] hypervisor_callback+0x46/0x50
[<c1017c26>] raw_local_irq_enable+0x20/0x22
[<c11f7557>] _spin_unlock_irq+0x27/0x2a
[<c101fcce>] do_syslog+0x122/0x30e
[<c10a33f2>] kmsg_read+0x34/0x3c
[<c106e0ac>] vfs_read+0xad/0x161
[<c106e538>] sys_read+0x3d/0x61
[<c1005568>] syscall_call+0x7/0xb
=======================


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