------------[ cut here ]------------
kernel BUG at /build/buildd/linux-2.6.35/fs/btrfs/disk-io.c:2292!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0/block/sdc/queue/rotational
Modules linked in: hid_logitech ff_memless usbhid hid ufs qnx4 hfsplus hfs minix ntfs msdos xfs exportfs reiserfs jfs binfmt_misc parport_pc ppdev lp parport dm_crypt snd_hda_codec_realtek arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi ath5k snd_seq_midi_event joydev snd_seq mac80211 snd_timer snd_seq_device uvcvideo ath acerhdf videodev v4l1_compat cfg80211 snd jmb38x_ms psmouse memstick serio_raw soundcore snd_page_alloc squashfs aufs nls_iso8859_1 nls_cp437 vfat fat dm_raid45 xor btrfs zlib_deflate crc32c libcrc32c i915 drm_kms_helper drm intel_agp r8169 sdhci_pci i2c_algo_bit sdhci video led_class agpgart output mii usb_storage

Pid: 16025, comm: btrfs-transacti Not tainted 2.6.35-19-generic #28-Ubuntu         /AOA110         
EIP: 0060:[<f8992a57>] EFLAGS: 00010282 CPU: 0
EIP is at write_all_supers+0x277/0x290 [btrfs]
EAX: 0000003a EBX: d846d3d8 ECX: c07cbcfc EDX: 00000000
ESI: 00000001 EDI: d846d3d8 EBP: eb7a9f24 ESP: eb7a9eec
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process btrfs-transacti (pid: 16025, ti=eb7a8000 task=f6a01960 task.ti=eb7a8000)
Stack:
 f89dd6e8 00000001 00000000 00000000 f658ed5b d746d800 d846d380 f658ee66
<0> f658ee76 00000000 00000001 c7ddf000 f658ed59 f658f884 eb7a9f2c f8992a81
<0> eb7a9f7c f89972e8 00000000 dc431d50 d746d800 00000000 00000001 c7ddf064
Call Trace:
 [<f8992a81>] ? write_ctree_super+0x11/0x20 [btrfs]
 [<f89972e8>] ? btrfs_commit_transaction+0x478/0x680 [btrfs]
 [<c0165920>] ? autoremove_wake_function+0x0/0x50
 [<f8991d67>] ? transaction_kthread+0x217/0x230 [btrfs]
 [<f8991b50>] ? transaction_kthread+0x0/0x230 [btrfs]
 [<c01654f4>] ? kthread+0x74/0x80
 [<c0165480>] ? kthread+0x0/0x80
 [<c010363e>] ? kernel_thread_helper+0x6/0x10
Code: 5d c3 8b 4d dc 8b 81 14 01 00 00 8b 80 cc 1d 00 00 83 c0 44 e8 7b 3f c3 c7 eb dd 89 74 24 04 c7 04 24 e8 d6 9d f8 e8 a6 2c c3 c7 <0f> 0b eb fe 89 54 24 04 c7 04 24 e8 d6 9d f8 e8 92 2c c3 c7 0f 
EIP: [<f8992a57>] write_all_supers+0x277/0x290 [btrfs] SS:ESP 0068:eb7a9eec
---[ end trace 24cbda5a386728c6 ]---