>From your logs, I can seen this occurs after a long set of ATA errors:
[114134.155011] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x2400000 action 0x0
[114134.155134] ata7.00: BMDMA2 stat 0x68652201
[114134.155208] ata7: SError: { Handshk UnrecFIS }
[114134.155276] ata7.00: failed command: WRITE DMA EXT
[114134.155368] ata7.00: cmd 35/00:00:f9:8b:18/00:04:01:00:00/e0 tag 0 dma
524288 out
[114134.155369] res 51/04:f1:08:8d:18/00:02:01:00:00/e0 Emask 0x1
(device error)
[114134.155639] ata7.00: status: { DRDY ERR }
[114134.155711] ata7.00: error: { ABRT }
[114134.189217] ata7.00: configured for UDMA/100
[114134.189232] ata7: EH complete
And these errors could actually be the root cause for your problem. One
common reason for these errors are cabling. Is it possible to check
power and SATA cables on your system?
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https://bugs.launchpad.net/bugs/1003081
Title:
INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies)
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