2.6.15 cfq oops

[Dave Jones <davej@redhat.com>]

Looks like some nice slab poison...

		Dave

Oops: 0000 [#1]
last sysfs file:
/devices/pci0000:00/0000:00:1d.7/usb1/1-0:1.0/bAlternateSettingModules linked
in: usb_storage ata_piix libata e1000 ohci1394 ieee1394 uhci_hcdsCPU:    0
EIP:    0060:[<c01c312e>]    Not tainted VLI
EFLAGS: 00010002   (2.6.15-1.1819_FC5)
EIP is at rb_next+0x9/0x22
eax: 6b6b6b6b   ebx: dfed01f8   ecx: c01bf65a   edx: 6b6b6b6b
esi: c1991e98   edi: 00000202   ebp: dfed403c   esp: c03c1f14
ds: 007b   es: 007b   ss: 0068
Process swapper (pid: 0, threadinfo=c03c1000 task=c0327ba0)
Stack: c01bf662 c01b5dfa dfed01f8 c01b85dc c040c284 00000004 c1991e98 c023c8ab
       c1991e98 00000000 c040c284 00000000 c023d3a4 000194d0 00000000 dfed403c
       c1991e98 c040c284 c1991e98 00000000 c0231f2d 000194d0 00000000 000194d0
Call Trace:
 [<c01bf662>] cfq_latter_request+0x8/0x14     [<c01b5dfa>] elv_latter_request+07
[<c01b85dc>] blk_attempt_remerge+0x1d/0x3c     [<c023c8ab>] cdrom_start_read+0e
[<c023d3a4>] ide_do_rw_cdrom+0xdd/0x14a     [<c0231f2d>] start_request+0x1b1/01
[<c023220f>] ide_do_request+0x2a0/0x2fb     [<c023265e>] ide_intr+0xf3/0x11b
 [<c023c1a7>] cdrom_read_intr+0x0/0x2a1     [<c013632a>] handle_IRQ_event+0x23/c
[<c01363cd>] __do_IRQ+0x7a/0xcd     [<c01054d0>] do_IRQ+0x5c/0x77
 =======================
 [<c0103cea>] common_interrupt+0x1a/0x20     [<c0101120>] mwait_idle+0x1a/0x2e
 [<c01010a3>] cpu_idle+0x38/0x4d     [<c0390635>] start_kernel+0x17a/0x17c
Code: 85 c0 74 0b 8b 50 0c 85 d2 74 04 89 d0 eb f5 c3 8b 00 85 c0 74 0b 8b 50 0

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