This might be a hint. Some time ago I noticed many ata messages like
these below. I tried some hdd test to see if there is an hdd problem and
could find any.
ata2: lost interrupt (Status 0x58)
ata2: drained 65536 bytes to clear DRQ.
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
sr 1:0:0:0: CDB: Get event status notification: 4a 01 00 00 10 00 00 00 08 00
ata2.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 16392 in
res 40/00:02:00:08:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata2.00: status: { DRDY }
ata2: soft resetting link
ata2.00: configured for UDMA/33
ata2: EH complete
ata2: lost interrupt (Status 0x58)
ata2: drained 65536 bytes to clear DRQ.
ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
sr 1:0:0:0: CDB: Get event status notification: 4a 01 00 00 10 00 00 00 08 00
ata2.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 16392 in
res 40/00:02:00:08:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
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https://bugs.launchpad.net/bugs/922976
Title:
Kernel Oops - BUG: unable to handle kernel paging request at 850f08bc;
EIP is at kmem_cache_alloc+0x50/0x100
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