[Nbd] general protection fault: 0000 [#1] SMP

[Richard Huddleston <rhuddusa@...17...>]

Linux box05 2.6.32-02063209-generic #02063209 SMP Wed Feb 24 10:09:53
UTC 2010 x86_64 GNU/Linux

i have a nbd device set up as an ext3 filesystem for an rsync target
for ~ 170 GB of data

in the process of diagnosing the bug, i ended up compiling and using
the latest nbd build for my client  nbd-2.9.15, but am using version
karmic's version 2.9.11 on the server

my system would constantly reboot during the rsync, so i fiddled with
many settings, finally settling on iommu=calgary and turning off txt
protection in the bios

that finally let my system stay up and actually print out what i
believe the real error was



[  545.431875] general protection fault: 0000 [#1] SMP
[  545.431882] last sysfs file:
/sys/devices/virtual/block/nbd0/queue/hw_sector_size
[  545.431886] CPU 5
[  545.431889] Modules linked in: ppdev autofs4 nfsd exportfs nfs
lockd nfs_acl coretemp auth_rpcgss max6650 snd_hda_codec_realtek nbd
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore
lp psmouse snd_page_alloc parport sunrpc serio_raw nvidia(P) joydev
raid10 raid456 async_raid6_recov async_pq usbhid raid6_pq async_xor
xor async_memcpy async_tx raid1 raid0 multipath linear e1000e
[  545.431936] Pid: 2892, comm: nbd0 Tainted: P        W
2.6.32-02063209-generic #02063209
[  545.431941] RIP: 0010:[<ffffffffa008d997>]  [<ffffffffa008d997>]
nbd_send_req+0x107/0x290 [nbd]
[  545.431951] RSP: 0018:ffff880107d8fda0  EFLAGS: 00010246
[  545.431955] RAX: 00000000000b7bc0 RBX: ffff880000000000 RCX: 5cca9f3044e334c4
[  545.431959] RDX: 000000000000e365 RSI: ffff880107d8fce0 RDI: ffff8801297c8808
[  545.431962] RBP: ffff880107d8fe10 R08: 0000000000000000 R09: 00000000000005a8
[  545.431966] R10: 000000000003f030 R11: 0000000000000002 R12: 5cca9f3044eeb094
[  545.431970] R13: 000000000000b7bc R14: ffff8800b8707cc0 R15: 0000000000008000
[  545.431974] FS:  0000000000000000(0000) GS:ffff880028340000(0000)
knlGS:0000000000000000
[  545.431978] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[  545.431982] CR2: 00000000006dec98 CR3: 0000000125b8c000 CR4: 00000000000006e0
[  545.431986] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  545.431990] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  545.431994] Process nbd0 (pid: 2892, threadinfo ffff880107d8e000,
task ffff880128100000)
[  545.431997] Stack:
[  545.431999]  ffff88012a018000 ffff88000b634690 0100000013956025
ffff88000b634690
[  545.432005] <0> 0040c1be07000000 ffff880100f00100 ffff880107d8fe10
0000000070ce9079
[  545.432011] <0> ffffffff810374c9 ffff880128100000 ffff88000b634690
ffff88012a018000
[  545.432018] Call Trace:
[  545.432028]  [<ffffffff810374c9>] ? default_spin_lock_flags+0x9/0x10
[  545.432035]  [<ffffffffa008dbc5>] nbd_handle_req+0xa5/0x180 [nbd]
[  545.432041]  [<ffffffffa008ddd4>] nbd_thread+0x134/0x150 [nbd]
[  545.432048]  [<ffffffff8107f720>] ? autoremove_wake_function+0x0/0x40
[  545.432054]  [<ffffffffa008dca0>] ? nbd_thread+0x0/0x150 [nbd]
[  545.432060]  [<ffffffff8107f59e>] kthread+0x8e/0xa0
[  545.432066]  [<ffffffff8101306a>] child_rip+0xa/0x20
[  545.432070]  [<ffffffff8107f510>] ? kthread+0x0/0xa0
[  545.432075]  [<ffffffff81013060>] ? child_rip+0x0/0x20
[  545.432078] Code: 74 d3 41 0f b7 46 2a 41 0f b7 56 28 49 8b 4e 48
44 0f b7 e8 44 39 ea 0f 8e d9 00 00 00 0f b7 c0 48 c1 e0 04 4c 8d 64
01 10 eb 74 <49> 8b 5c 24 f0 e8 1f 63 4a e1 48 ba 00 00 00 00 00 16 00
00 41
[  545.432125] RIP  [<ffffffffa008d997>] nbd_send_req+0x107/0x290 [nbd]
[  545.432131]  RSP <ffff880107d8fda0>
[  545.432135] ---[ end trace e54070aa0c335af2 ]---

lspci output ---------------------------

00:00.0 Host bridge: Intel Corporation Core Processor DMI (rev 11)
00:03.0 PCI bridge: Intel Corporation Core Processor PCI Express Root
Port 1 (rev 11)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:08.0 System peripheral: Intel Corporation Core Processor System
Management Registers (rev 11)
00:08.1 System peripheral: Intel Corporation Core Processor Semaphore
and Scratchpad Registers (rev 11)
00:08.2 System peripheral: Intel Corporation Core Processor System
Control and Status Registers (rev 11)
00:08.3 System peripheral: Intel Corporation Core Processor
Miscellaneous Registers (rev 11)
00:10.0 System peripheral: Intel Corporation Core Processor QPI Link (rev 11)
00:10.1 System peripheral: Intel Corporation Core Processor QPI
Routing and Protocol Registers (rev 11)
00:19.0 Ethernet controller: Intel Corporation 82578DC Gigabit Network
Connection (rev 05)
	Kernel driver in use: e1000e
	Kernel modules: e1000e
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset
USB2 Enhanced Host Controller (rev 05)
	Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset
High Definition Audio (rev 05)
	Kernel driver in use: HDA Intel
	Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI
Express Root Port 1 (rev 05)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI
Express Root Port 5 (rev 05)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.6 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI
Express Root Port 7 (rev 05)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.7 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI
Express Root Port 8 (rev 05)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset
USB2 Enhanced Host Controller (rev 05)
	Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation 5 Series Chipset LPC Interface
Controller (rev 05)
	Kernel modules: iTCO_wdt
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series
Chipset 6 port SATA AHCI Controller (rev 05)
	Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus
Controller (rev 05)
	Kernel modules: i2c-i801
01:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce
9800 GT] (rev a2)
	Kernel driver in use: nvidia
	Kernel modules: nvidia, nvidiafb
05:00.0 IDE interface: Marvell Technology Group Ltd. 88SE6121 SATA II
Controller (rev b2)
	Kernel driver in use: pata_marvell