Bio device too big | kernel BUG at mm/filemap.c:537!

["Kai" <epimetreus@fastmail.fm>]

I booted up the new kernel version, 2.6.20; I pretty much copied over my
.config that worked in 2.6.19.2, that has worked correctly since that
version came out... I looked through the menuconfig to see if any new
options had been added, but I'm pretty sure I didn't change anything,
and got this error message shortly after booting:

bio too big device hdg1 (184 > 128)
------------[ cut here ]------------
kernel BUG at mm/filemap.c:537!
invalid opcode: 0000 [#1]
Modules linked in: iptable_filter ip_tables x_tables snd_seq_dummy
snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss
snd_mixer_oss nvidia_agp agpgart
CPU:    0
EIP:    0060:[<c012dc66>]    Not tainted VLI
EFLAGS: 00010246   (2.6.20 #1)
EIP is at unlock_page+0xd/0x22
eax: 00000000   ebx: c1714a20   ecx: 00000000   edx: c1714a20
esi: c199c45c   edi: 00000001   ebp: 1422bf48   esp: f7c8df18
ds: 007b   es: 007b   ss: 0068
Process md0_raid5 (pid: 901, ti=f7c8c000 task=f7c50050 task.ti=f7c8c000)
Stack: c1997920 c016363c c1bca460 c1997920 c1bca460 c0315af2 f7c8df4c
f7c8df50
       c1bca460 00000000 00000000 1422bf48 0a115f48 00000002 00000000
       c1bca460
       00000002 f7faf600 fffffffc c0315b92 f7ee6c20 7fffffff f7c8df8c
       c031f877
Call Trace:
 [<c016363c>] mpage_end_io_read+0x4c/0x5e
 [<c0315af2>] retry_aligned_read+0x108/0x13a
 [<c0315b92>] raid5d+0x6e/0xcc
 [<c031f877>] md_thread+0xdc/0xf2
 [<c0122465>] autoremove_wake_function+0x0/0x33
 [<c0110a90>] __wake_up_common+0x35/0x4f
 [<c0122465>] autoremove_wake_function+0x0/0x33
 [<c031f79b>] md_thread+0x0/0xf2
 [<c01221b8>] kthread+0x72/0x97
 [<c0122146>] kthread+0x0/0x97
 [<c0103a7b>] kernel_thread_helper+0x7/0x10
 =======================
Code: 73 ff ff ff b9 a4 d6 12 c0 89 fa c7 04 24 02 00 00 00 e8 87 77 27
00 83 c4 44 5b 5e 5f c3 53 89 c3 0f ba 30 00 19 c0 85 c0 75 04 <0f> 0b
eb fe 89 d8 e8 41 ff ff ff 89$
EIP: [<c012dc66>] unlock_page+0xd/0x22 SS:ESP 0068:f7c8df18

The devices it seems to be complaining about are /dev/hdg and /dev/hde,
which are physically attached to the PCI0680 Ultra ATA-133 Host
Controller listed in lspci.txt.
Both drives are 160 GB Western Digital HDDs... don't remember the
precise model, but I can find out if necessary.

Attached are the output of lspci and my .config; if anyone needs further
info, let me know.
Please CC replies, not subscribed.

Cheers,

-Kai

Attachment: .config
Description: Binary data

00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?) (rev c1)
	Subsystem: ASUSTeK Computer Inc. Unknown device 80ac
	Flags: bus master, 66MHz, fast devsel, latency 0
	Memory at e0000000 (32-bit, prefetchable) [size=128M]
	Capabilities: [40] AGP version 3.0
	Capabilities: [60] HyperTransport: Host or Secondary Interface

00:00.1 RAM memory: nVidia Corporation nForce2 Memory Controller 1 (rev c1)
	Subsystem: ASUSTeK Computer Inc. Unknown device 80ac
	Flags: 66MHz, fast devsel

00:00.2 RAM memory: nVidia Corporation nForce2 Memory Controller 4 (rev c1)
	Subsystem: ASUSTeK Computer Inc. Unknown device 80ac
	Flags: 66MHz, fast devsel

00:00.3 RAM memory: nVidia Corporation nForce2 Memory Controller 3 (rev c1)
	Subsystem: ASUSTeK Computer Inc. Unknown device 80ac
	Flags: 66MHz, fast devsel

00:00.4 RAM memory: nVidia Corporation nForce2 Memory Controller 2 (rev c1)
	Subsystem: ASUSTeK Computer Inc. Unknown device 80ac
	Flags: 66MHz, fast devsel

00:00.5 RAM memory: nVidia Corporation nForce2 Memory Controller 5 (rev c1)
	Subsystem: ASUSTeK Computer Inc. Unknown device 80ac
	Flags: 66MHz, fast devsel

00:01.0 ISA bridge: nVidia Corporation nForce2 ISA Bridge (rev a4)
	Subsystem: ASUSTeK Computer Inc. A7N8X Mainboard
	Flags: bus master, 66MHz, fast devsel, latency 0
	Capabilities: [48] HyperTransport: Slave or Primary Interface

00:01.1 SMBus: nVidia Corporation nForce2 SMBus (MCP) (rev a2)
	Subsystem: ASUSTeK Computer Inc. Unknown device 0c11
	Flags: 66MHz, fast devsel, IRQ 5
	I/O ports at c800 [size=32]
	Capabilities: [44] Power Management version 2

00:02.0 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4) (prog-if 10 [OHCI])
	Subsystem: ASUSTeK Computer Inc. A7N8X Mainboard
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19
	Memory at ea081000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [44] Power Management version 2

00:02.1 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4) (prog-if 10 [OHCI])
	Subsystem: ASUSTeK Computer Inc. A7N8X Mainboard
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16
	Memory at ea083000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [44] Power Management version 2

00:02.2 USB Controller: nVidia Corporation nForce2 USB Controller (rev a4) (prog-if 20 [EHCI])
	Subsystem: ASUSTeK Computer Inc. A7N8X Mainboard
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 18
	Memory at ea084000 (32-bit, non-prefetchable) [size=256]
	Capabilities: [44] Debug port
	Capabilities: [80] Power Management version 2

00:04.0 Ethernet controller: nVidia Corporation nForce2 Ethernet Controller (rev a1)
	Subsystem: ASUSTeK Computer Inc. A7N8X Mainboard onboard nForce2 Ethernet
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16
	Memory at ea080000 (32-bit, non-prefetchable) [size=4K]
	I/O ports at cc00 [size=8]
	Capabilities: [44] Power Management version 2

00:05.0 Multimedia audio controller: nVidia Corporation nForce Audio Processing Unit (rev a2)
	Subsystem: ASUSTeK Computer Inc. Unknown device 0c11
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 12
	Memory at ea000000 (32-bit, non-prefetchable) [size=512K]
	Capabilities: [44] Power Management version 2

00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 Audio Controler (MCP) (rev a1)
	Subsystem: ASUSTeK Computer Inc. nForce2 AC97 Audio Controler (MCP)
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 18
	I/O ports at c000 [size=256]
	I/O ports at c400 [size=128]
	Memory at ea082000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [44] Power Management version 2

00:08.0 PCI bridge: nVidia Corporation nForce2 External PCI Bridge (rev a3) (prog-if 00 [Normal decode])
	Flags: bus master, 66MHz, fast devsel, latency 0
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
	I/O behind bridge: 00009000-0000afff
	Memory behind bridge: e8000000-e9ffffff
	Prefetchable memory behind bridge: 50000000-500fffff

00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2) (prog-if 8a [Master SecP PriP])
	Subsystem: ASUSTeK Computer Inc. Unknown device 0c11
	Flags: bus master, 66MHz, fast devsel, latency 0
	I/O ports at f000 [size=16]
	Capabilities: [44] Power Management version 2

00:1e.0 PCI bridge: nVidia Corporation nForce2 AGP (rev c1) (prog-if 00 [Normal decode])
	Flags: bus master, 66MHz, medium devsel, latency 32
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
	I/O behind bridge: 0000b000-0000bfff
	Memory behind bridge: c0000000-dfffffff
	Prefetchable memory behind bridge: 50100000-501fffff

01:0a.0 Mass storage controller: Silicon Image, Inc. PCI0680 Ultra ATA-133 Host Controller (rev 02)
	Subsystem: Silicon Image, Inc. PCI0680 Ultra ATA-133 Host Controller
	Flags: bus master, medium devsel, latency 32, IRQ 17
	I/O ports at 9000 [size=8]
	I/O ports at 9400 [size=4]
	I/O ports at 9800 [size=8]
	I/O ports at 9c00 [size=4]
	I/O ports at a000 [size=16]
	Memory at e9000000 (32-bit, non-prefetchable) [size=256]
	[virtual] Expansion ROM at 50000000 [disabled] [size=512K]
	Capabilities: [60] Power Management version 2

02:00.0 VGA compatible controller: ATI Technologies Inc RV530 [Radeon X1600] (prog-if 00 [VGA])
	Subsystem: PC Partner Limited Unknown device 0850
	Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 5
	Memory at c0000000 (64-bit, prefetchable) [size=256M]
	Memory at d1000000 (64-bit, non-prefetchable) [size=64K]
	I/O ports at b000 [size=256]
	[virtual] Expansion ROM at 50100000 [disabled] [size=128K]
	Capabilities: [50] Power Management version 2
	Capabilities: [58] AGP version 3.0
	Capabilities: [80] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-

02:00.1 Display controller: ATI Technologies Inc RV530 [Radeon X1600] (Secondary)
	Subsystem: PC Partner Limited Unknown device 0851
	Flags: 66MHz, medium devsel
	Memory at d1010000 (64-bit, non-prefetchable) [disabled] [size=64K]
	Capabilities: [50] Power Management version 2