Bug#504805: Boom
[57049.874985] iret exception: 0000 [#1] SMP
[57049.875210] Modules linked in: xt_physdev iptable_filter ip_tables
x_tables inet_diag ipv6 bridge ext3 jbd mbcache drbd cn loop evdev
parport_pc parport i2c_i801 i2c_core pcspkr rng_core button intel_agp
agpgart shpchp pci_hotplug i82875p_edac edac_core xfs dm_mirror dm_log
dm_snapshot dm_mod raid1 md_mod sd_mod ide_cd_mod cdrom ata_piix
ata_generic libata scsi_mod dock piix floppy e1000 ide_pci_generic
ide_core ehci_hcd uhci_hcd usbcore thermal processor fan thermal_sys
[last unloaded: scsi_wait_scan]
[57049.877978]
[57049.877978] Pid: 4564, comm: blkback.2.sda Not tainted
(2.6.26-2-xen-686 #1)
[57049.877978] EIP: 0061:[<c01e4443>] EFLAGS: 00000002 CPU: 0
[57049.877978] EIP is at ioread8+0x16/0x2a
[57049.877978] EAX: 0001c850 EBX: 000003e8 ECX: 010c2000 EDX: 0000c807
[57049.877978] ESI: ce280028 EDI: ce280000 EBP: ce280000 ESP: cd1f5b70
[57049.877978] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
[57049.877978] Process blkback.2.sda (pid: 4564, ti=cd1f4000
task=cd2a5b00 task.ti=cd1f4000)
[57049.877978] Stack: d115a26f d115bcc5 00000016 00000000 ce280078
ce280000 ce281404 d115ba67
[57049.877978] 00000000 ce280078 ce280000 d114fe26 ce280078
cef6f180 ce281528 d10dd426
[57049.877978] d11542da ce280000 cef6f180 ce281528 d10dd426
ce280000 d1156501 d1154024
[57049.877978] Call Trace:
[57049.881623] [<d115a26f>] ata_sff_check_status+0x8/0xc [libata]
[57049.881623] [<d115bcc5>] ata_sff_tf_load+0xe4/0x137 [libata]
[57049.881623] [<d115ba67>] ata_sff_qc_issue+0xbf/0x1d8 [libata]
[57049.881623] [<d114fe26>] ata_qc_issue+0x161/0x1b6 [libata]
[57049.881623] [<d10dd426>] scsi_done+0x0/0x16 [scsi_mod]
[57049.881623] [<d11542da>] ata_scsi_translate+0xd2/0xf7 [libata]
[57049.881623] [<d10dd426>] scsi_done+0x0/0x16 [scsi_mod]
[57049.881623] [<d1156501>] ata_scsi_queuecmd+0x1c7/0x1df [libata]
[57049.881623] [<d1154024>] ata_scsi_rw_xlat+0x0/0x1c1 [libata]
[57049.881623] [<d10dda88>] scsi_dispatch_cmd+0x18b/0x205 [scsi_mod]
[57049.881623] [<d10e2e74>] scsi_request_fn+0x29d/0x3af [scsi_mod]
[57049.881623] [<c01d1e54>] __generic_unplug_device+0x1a/0x1c
[57049.881623] [<c01cfbec>] elv_insert+0x102/0x196
[57049.885625] [<c01d2546>] __make_request+0x2fe/0x36e
[57049.885625] [<c01d124d>] generic_make_request+0x34d/0x37b
[57049.885625] [<c023d76f>] evtchn_do_upcall+0xfa/0x191
[57049.885625] [<c0150871>] mempool_alloc+0x1c/0xba
[57049.885625] [<c01d2241>] submit_bio+0xc6/0xcd
[57049.885625] [<c0191cd9>] bio_add_page+0x25/0x2c
[57049.885625] [<c0245398>] dispatch_rw_block_io+0x4c5/0x55d
[57049.885625] [<c0105ffd>] local_clock+0x2d/0x6f
[57049.885625] [<c0105f74>] get_nsec_offset+0xe/0x6a
[57049.885625] [<c0102eb7>] __switch_to+0x376/0x42e
[57049.885625] [<c0105f74>] get_nsec_offset+0xe/0x6a
[57049.885625] [<c0106149>] get_runstate_snapshot+0x69/0xec
[57049.885625] [<c0105f74>] get_nsec_offset+0xe/0x6a
[57049.885625] [<c0106149>] get_runstate_snapshot+0x69/0xec
[57049.885625] [<c0115389>] update_curr+0x47/0x79
[57049.885625] [<c0115fd9>] __dequeue_entity+0x1f/0x71
[57049.885625] [<c02ca8b5>] schedule+0x631/0x6b1
[57049.889626] [<d11a1b30>] md_wakeup_thread+0x1e/0x20 [md_mod]
[57049.889626] [<c0245823>] blkif_schedule+0x39d/0x4b6
[57049.889626] [<c0245486>] blkif_schedule+0x0/0x4b6
[57049.889626] [<c012ebd5>] kthread+0x38/0x5f
[57049.889626] [<c012eb9d>] kthread+0x0/0x5f
[57049.889626] [<c010425f>] kernel_thread_helper+0x7/0x10
[57049.889626] =======================
[57049.889626] Code: c0 81 e2 ff ff 00 00 ee c3 ba 8b a4 32 c0 89 c8 e9
f3 fd ff ff 3d ff ff 03 00 76 04 8a 00 eb 0b 3d 00 00 01 00 76 08 0f b7
d0 ec <0f> b6 c0 c3 ba 9a a4 32 c0 e8 cf fd ff ff b8 ff 00 00 00 c3 3d
[57049.893632] EIP: [<c01e4443>] ioread8+0x16/0x2a SS:ESP 0069:cd1f5b70
[57049.907810] ---[ end trace 40d498c3636b9d0c ]---
Is there actually any point in sending this, or will it just be ignored...
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