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[Xen-devel] 2.6.29-rc7 pv_ops dom0 BUG / unable to handle kernel paging request



Hello!

Latest git tree (updated some hours ago) boots up fine for me, xend can be 
started etc, 
but some time after starting kernel compilation I get the following BUG:

http://pasik.reaktio.net/xen/pv_ops-dom0-debug/pv_ops-dom0-bootlog-19-xen331-linux-2.6.29-rc7-bug.txt

(XEN) mm.c:2006:d0 Bad type (saw 28000001 != exp e0000000) for mfn 436a3 (pfn 
3d0a3)
(XEN) mm.c:707:d0 Error getting mfn 436a3 (pfn 3d0a3) from L1 entry 
00000000436a3063 for dom0
(XEN) mm.c:3640:d0 ptwr_emulate: could not get_page_from_l1e()
BUG: unable to handle kernel paging request at c01cbd58
IP: [<c0405d2f>] xen_set_pte+0x8c/0x96
*pdpt = 000000003d1f0001 
Oops: 0003 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:01.0/class
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat bridge stp bnep sco
l2cap bluetooth sunrpc ipv6 dm_multipath uinput
 ppdev floppy i2c_i801 pcspkr iTCO_wdt i2c_core iTCO_vendor_support
pata_pdc2027x sata_promise parport_pc parport tg3 li
bphy ata_generic pata_acpi [last unloaded: microcode]

Pid: 325, comm: kswapd0 Not tainted (2.6.29-rc7-tip #10) P8SC8
EIP: 0061:[<c0405d2f>] EFLAGS: 00010206 CPU: 0
EIP is at xen_set_pte+0x8c/0x96
EAX: c01cbd58 EBX: 000e133a ECX: 00000000 EDX: 00000000
ESI: 436a3063 EDI: 0003d0a3 EBP: e2152d8c ESP: e2152d78
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
Process kswapd0 (pid: 325, ti=e2152000 task=e219a610 task.ti=e2152000)
Stack:
 00000000 c01cbd58 3d0a3063 c01cbd58 0003d0a3 e2152db4 c0427ff5 00000000
 80000000 00000163 f57ff000 0000000f c19d3460 0000000f c1232000 e2152dcc
 c0404d91 00000163 80000000 436a3067 0a078000 e2152df4 c0489c17 00000000
Call Trace:
 [<c0427ff5>] ? kmap_atomic_prot+0x1cd/0x1ef
 [<c0404d91>] ? xen_kmap_atomic_pte+0x2f/0x36
 [<c0489c17>] ? page_check_address+0x7f/0x131
 [<c0489d71>] ? page_referenced_one+0x4b/0xe9
 [<c048aa4b>] ? page_referenced+0x7d/0xee
 [<c047b3f0>] ? shrink_active_list+0x10b/0x29c
 [<c0422bfe>] ? pvclock_clocksource_read+0x48/0xa3
 [<c0407410>] ? __xen_spin_lock+0xc4/0xd8
 [<c047c27b>] ? shrink_zone+0x285/0x29a
 [<c047c77a>] ? kswapd+0x3b6/0x53d
 [<c047aa07>] ? isolate_pages_global+0x0/0x19e
 [<c04480cf>] ? autoremove_wake_function+0x0/0x33
 [<c047c3c4>] ? kswapd+0x0/0x53d
 [<c0447e03>] ? kthread+0x3b/0x61
 [<c0447dc8>] ? kthread+0x0/0x61
 [<c04097c7>] ? kernel_thread_helper+0x7/0x10
Code: f3 ab c6 05 9c 33 8d c0 00 8b 1d fc 32 8d c0 e8 2d cb 01 00 8b 55 ec
48 0f 94 c0 0f b6 c0 01 d8 a3 fc 32 8d c0 8b 
45 f0 89 50 04 <89> 30 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 57 56 89 c6 53 89 d3
83 
EIP: [<c0405d2f>] xen_set_pte+0x8c/0x96 SS:ESP 0069:e2152d78
CR2: 00000000c01cbd58
---[ end trace b993ac68a500f37e ]---
..
.. 

.. and a lot of other stuff after this.

-- Pasi

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