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kernel BUG at /home/fabio/w/bfq/cfq/block/cfq-iosched.c:1183!
invalid opcode: 0000 [#1] PREEMPT 
Modules linked in: cfq_iosched fan ac battery thermal button processor [last unloaded: cfq_iosched]

Pid: 3394, comm: tiotest Not tainted (2.6.25-rc8 #4)
EIP: 0060:[<d9019467>] EFLAGS: 00010046 CPU: 0
EIP is at cic_free_func+0xe/0x50 [cfq_iosched]
EAX: d780df90 EBX: d79765f4 ECX: 0000000e EDX: d79765f4
ESI: d780df90 EDI: d83d2d98 EBP: 00000400 ESP: c6d85ba4
 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process tiotest (pid: 3394, ti=c6d84000 task=c6dc1070 task.ti=c6d84000)
Stack: d780df90 d9019459 d83d2d98 00000400 d90193f3 d7976634 d780df90 d7b5c5c0 
       c02a9e09 cc75ea80 d901988b cc75ea80 000104c5 c02a5dbb c02a7b08 cc75ea80 
       00000000 c06fd820 00000000 c02a7ce6 cc75ea80 00080000 c031e352 00080000 
Call Trace:
 [<d9019459>] cic_free_func+0x0/0x50 [cfq_iosched]
 [<d90193f3>] call_for_each_cic+0x4b/0x89 [cfq_iosched]
 [<c02a9e09>] put_io_context+0x98/0xad
 [<d901988b>] cfq_put_request+0x2d/0x47 [cfq_iosched]
 [<c02a5dbb>] elv_put_request+0x10/0x11
 [<c02a7b08>] __blk_put_request+0x4e/0x6f
 [<c02a7ce6>] __blk_end_request+0x30/0x37
 [<c031e352>] __ide_end_request+0x69/0x8f
 [<c031e413>] ide_end_request+0x48/0x5f
 [<c0322586>] task_end_request+0x40/0x51
 [<c03244f9>] ide_dma_intr+0x67/0x6e
 [<c0324492>] ide_dma_intr+0x0/0x6e
 [<c031f17a>] ide_intr+0x133/0x18e
 [<c0234b67>] handle_IRQ_event+0x13/0x3d
 [<c0235cf0>] handle_level_irq+0xa8/0xb8
 [<c0205465>] do_IRQ+0x67/0x7a
 [<c0203e3e>] common_interrupt+0x2e/0x34
 [<c023007b>] rt_mutex_adjust_prio_chain+0x9d/0x320
 [<c023c2cb>] get_page_from_freelist+0x24a/0x3a3
 [<c023c48d>] __alloc_pages+0x69/0x2c9
 [<c0237ed0>] find_lock_page+0x74/0x7c
 [<c0238088>] __grab_cache_page+0x5b/0x90
 [<c02840b4>] ext3_write_begin+0x51/0x168
 [<c0283ec9>] ext3_ordered_write_end+0xdf/0xee
 [<c0238ab5>] generic_file_buffered_write+0xfa/0x574
 [<c022d198>] __lock_acquire+0xb84/0xba0
 [<c0239395>] __generic_file_aio_write_nolock+0x466/0x4b2
 [<c03b2d4d>] mutex_lock_nested+0x20e/0x216
 [<c0239431>] generic_file_aio_write+0x50/0xba
 [<c0239444>] generic_file_aio_write+0x63/0xba
 [<c0280c6d>] ext3_file_write+0x19/0x83
 [<c024ecf9>] do_sync_write+0xbd/0x104
 [<c0224134>] autoremove_wake_function+0x0/0x2b
 [<c024ec3c>] do_sync_write+0x0/0x104
 [<c024f36c>] vfs_write+0x73/0xa6
 [<c024f773>] sys_write+0x3c/0x63
 [<c0203c2e>] syscall_call+0x7/0xb
 =======================
Code: d9 e9 66 ff ff ff ba 59 94 01 d9 e9 5c ff ff ff 83 c0 50 ba a9 94 01 d9 e9 47 d0 21 e7 55 57 56 89 c6 53 89 d3 83 7a 04 00 75 04 <0f> 0b eb fe 8d 78 08 89 f8 e8 97 a9 39 e7 8b 53 04 89 c5 8d 46 
EIP: [<d9019467>] cic_free_func+0xe/0x50 [cfq_iosched] SS:ESP 0068:c6d85ba4
Kernel panic - not syncing: Fatal exception in interrupt