[Xen-devel] pv_ops dom0 attempt

["Christopher S. Aker" <caker@xxxxxxxxxxxx>]

Decided to give pv_ops dom0 another go (from a few weeks ago).  Does 
pv_ops dom0 require an unstable hypervisor?  Here's what I get with a 64 
bit 3.4.1 hypervisor and a dom0 kernel from a a recent clone of 
rebase/master:
BUG: unable to handle kernel paging request at 82c64bbd
IP: [<c14ad4cd>] acpi_processor_start+0x50d/0x762
*pdpt = 00000009256e7007
Oops: 0002 [#1] SMP
last sysfs file:
Modules linked in:

Pid: 1, comm: swapper Not tainted (2.6.31-pvops-1-01410-gebf47a1-dirty 
#1) X8DTU
EIP: 0061:[<c14ad4cd>] EFLAGS: 00010246 CPU: 0
EIP is at acpi_processor_start+0x50d/0x762
EAX: c16db580 EBX: d6265800 ECX: d6227400 EDX: c158963d
ESI: ffffffff EDI: d6227428 EBP: d6061e88 ESP: d6061e40
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: e021
Process swapper (pid: 1, ti=d6060000 task=d605fbc0 task.ti=d6060000)
Stack:
 d6227400 d6265800 00000000 d70a2462 0000000c 00000008 00000000 00000000
<0> 00000000 00000000 00000002 d6002440 00000000 d6061e50 c1092964 c1653bb8
<0> c1653bb8 d6227400 d6061e9c c129b307 d6227400 c1653bb8 00000000 d6061eb8
Call Trace:
 [<c1092964>] ? kmem_cache_alloc+0x54/0xa0
 [<c129b307>] ? acpi_start_single_object+0x1e/0x3f
 [<c129b511>] ? acpi_device_probe+0x81/0x139
 [<c1300449>] ? driver_probe_device+0x69/0x170
 [<c14b0181>] ? _spin_unlock_irqrestore+0x21/0x30
 [<c13005d1>] ? __driver_attach+0x81/0x90
 [<c12ffd7b>] ? bus_for_each_dev+0x5b/0x80
 [<c129b3c2>] ? acpi_device_remove+0x0/0xce
 [<c13002f9>] ? driver_attach+0x19/0x20
 [<c1300550>] ? __driver_attach+0x0/0x90
 [<c12ff5fc>] ? bus_add_driver+0xbc/0x260
 [<c129b3c2>] ? acpi_device_remove+0x0/0xce
 [<c1300855>] ? driver_register+0x75/0x160
 [<c129cbbd>] ? acpi_bus_register_driver+0x3a/0x3d
 [<c1699e5a>] ? acpi_processor_init+0x86/0xe7
 [<c129cbbd>] ? acpi_bus_register_driver+0x3a/0x3d
 [<c1699dd4>] ? acpi_processor_init+0x0/0xe7
 [<c1002033>] ? do_one_initcall+0x23/0x180
 [<c106aa77>] ? init_irq_proc+0x67/0x80
 [<c167635d>] ? kernel_init+0x138/0x191
 [<c1676225>] ? kernel_init+0x0/0x191
 [<c100ab07>] ? kernel_thread_helper+0x7/0x10
Code: 15 68 3f 84 5c c1 bb ed ff ff ff e8 19 08 00 00 5e e9 48 02 00 00 
8b 5d bc b8 80 b5 6d c1 8b 4d b8 8b 53 08 8b 14 95 e0 22 67 c1 <89> 0c 
10 8b 53 08 b8 84 b5 6d c1 8b 14 95 e0 22 67 c1 89 1c 10
EIP: [<c14ad4cd>] acpi_processor_start+0x50d/0x762 SS:ESP e021:d6061e40
CR2: 0000000082c64bbd
---[ end trace a7919e7f17c0a725 ]---
Kernel panic - not syncing: Attempted to kill init!
Pid: 1, comm: swapper Tainted: G      D 
2.6.31-pvops-1-01410-gebf47a1-dirty #1
Call Trace:
 [<c14adce3>] ? printk+0x18/0x1a
 [<c14adc1b>] panic+0x43/0xf3
 [<c1037023>] do_exit+0x5b3/0x680
 [<c14adce3>] ? printk+0x18/0x1a
 [<c100da28>] oops_end+0xc8/0xd0
 [<c1020c26>] no_context+0xb6/0x1a0
 [<c1020d6b>] __bad_area_nosemaphore+0x5b/0x170
 [<c1005d9a>] ? xen_force_evtchn_callback+0x1a/0x30
 [<c1005d9a>] ? xen_force_evtchn_callback+0x1a/0x30
 [<c10065dc>] ? check_events+0x8/0xc
 [<c10065d3>] ? xen_restore_fl_direct_end+0x0/0x1
 [<c14b0181>] ? _spin_unlock_irqrestore+0x21/0x30
 [<c1005d9a>] ? xen_force_evtchn_callback+0x1a/0x30
 [<c10065dc>] ? check_events+0x8/0xc
 [<c10065d3>] ? xen_restore_fl_direct_end+0x0/0x1
 [<c1091ce4>] ? kfree+0x74/0x90
 [<c12ae9a2>] ? acpi_ns_get_node+0x7c/0x86
 [<c1020e92>] bad_area_nosemaphore+0x12/0x20
 [<c10211d4>] do_page_fault+0x1b4/0x260
 [<c1021020>] ? do_page_fault+0x0/0x260
 [<c14b045e>] error_code+0x66/0x6c
 [<c126007b>] ? as_can_break_anticipation+0xeb/0x2f0
 [<c1021020>] ? do_page_fault+0x0/0x260
 [<c14ad4cd>] ? acpi_processor_start+0x50d/0x762
 [<c1092964>] ? kmem_cache_alloc+0x54/0xa0
 [<c129b307>] acpi_start_single_object+0x1e/0x3f
 [<c129b511>] acpi_device_probe+0x81/0x139
 [<c1300449>] driver_probe_device+0x69/0x170
 [<c14b0181>] ? _spin_unlock_irqrestore+0x21/0x30
 [<c13005d1>] __driver_attach+0x81/0x90
 [<c12ffd7b>] bus_for_each_dev+0x5b/0x80
 [<c129b3c2>] ? acpi_device_remove+0x0/0xce
 [<c13002f9>] driver_attach+0x19/0x20
 [<c1300550>] ? __driver_attach+0x0/0x90
 [<c12ff5fc>] bus_add_driver+0xbc/0x260
 [<c129b3c2>] ? acpi_device_remove+0x0/0xce
 [<c1300855>] driver_register+0x75/0x160
 [<c129cbbd>] acpi_bus_register_driver+0x3a/0x3d
 [<c1699e5a>] acpi_processor_init+0x86/0xe7
 [<c129cbbd>] ? acpi_bus_register_driver+0x3a/0x3d
 [<c1699dd4>] ? acpi_processor_init+0x0/0xe7
 [<c1002033>] do_one_initcall+0x23/0x180
 [<c106aa77>] ? init_irq_proc+0x67/0x80
 [<c167635d>] kernel_init+0x138/0x191
 [<c1676225>] ? kernel_init+0x0/0x191
 [<c100ab07>] kernel_thread_helper+0x7/0x10

Full boot log here: http://p.linode.com/2993

What is the recommended recipe for pv_ops dom0?

-Chris

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