[  480.795781] INFO: task flush-104:0:344 blocked for more than 120 seconds.
[  480.808585] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  480.833447] flush-104:0   D 00000000ffffffff     0   344      2 0x00000000
[  480.833451]  ffff88034bacd700 0000000000000046 0000000000015e00 0000000000015e00
[  480.833465]  ffff88034bac31d0 ffff88034bacdfd8 0000000000015e00 ffff88034bac2e00
[  480.833481]  0000000000015e00 ffff88034bacdfd8 0000000000015e00 ffff88034bac31d0
[  480.833497] Call Trace:
[  480.833504]  [<ffffffff8155eb93>] io_schedule+0x73/0xc0
[  480.833515]  [<ffffffff812a3b8e>] get_request_wait+0xce/0x1a0
[  480.833518]  [<ffffffff81086470>] ? autoremove_wake_function+0x0/0x40
[  480.833521]  [<ffffffff81560b2e>] ? _spin_lock+0xe/0x20
[  480.833524]  [<ffffffff812a4275>] __make_request+0x95/0x4a0
[  480.833527]  [<ffffffff812a29d1>] generic_make_request+0x1b1/0x4f0
[  480.833530]  [<ffffffff810f8bd5>] ? mempool_alloc_slab+0x15/0x20
[  480.833534]  [<ffffffff8104bfa9>] ? __wake_up_common+0x59/0x90
[  480.833537]  [<ffffffff812a2d90>] submit_bio+0x80/0x110
[  480.833540]  [<ffffffff8116fe59>] submit_bh+0xf9/0x140
[  480.833543]  [<ffffffff81171d80>] __block_write_full_page+0x1d0/0x3b0
[  480.833546]  [<ffffffff81171620>] ? end_buffer_async_write+0x0/0x180
[  480.833549]  [<ffffffff811bcd70>] ? ext3_get_block+0x0/0x120
[  480.833552]  [<ffffffff811bcd70>] ? ext3_get_block+0x0/0x120
[  480.833555]  [<ffffffff81172890>] block_write_full_page_endio+0xe0/0x120
[  480.833558]  [<ffffffff811b9f80>] ? bget_one+0x0/0x20
[  480.833561]  [<ffffffff811728e5>] block_write_full_page+0x15/0x20
[  480.833564]  [<ffffffff811ba9f3>] ext3_ordered_writepage+0x103/0x200
[  480.833568]  [<ffffffff810fed77>] __writepage+0x17/0x40
[  480.833570]  [<ffffffff810ffef7>] write_cache_pages+0x1d7/0x3e0
[  480.833573]  [<ffffffff810fed60>] ? __writepage+0x0/0x40
[  480.833576]  [<ffffffff81100124>] generic_writepages+0x24/0x30
[  480.833579]  [<ffffffff81100165>] do_writepages+0x35/0x40
[  480.833582]  [<ffffffff81169466>] writeback_single_inode+0xf6/0x3d0
[  480.833585]  [<ffffffff81169b95>] writeback_sb_inodes+0x195/0x280
[  480.833588]  [<ffffffff8116a3b0>] writeback_inodes_wb+0xa0/0x1b0
[  480.833590]  [<ffffffff8116a6fb>] wb_writeback+0x23b/0x2a0
[  480.833593]  [<ffffffff81077d4c>] ? lock_timer_base+0x3c/0x70
[  480.833596]  [<ffffffff8116a8dc>] wb_do_writeback+0x17c/0x190
[  480.833599]  [<ffffffff81077e60>] ? process_timeout+0x0/0x10
[  480.833601]  [<ffffffff8116a943>] bdi_writeback_task+0x53/0xf0
[  480.833606]  [<ffffffff81111b96>] bdi_start_fn+0x86/0x100
[  480.833608]  [<ffffffff81111b10>] ? bdi_start_fn+0x0/0x100
[  480.833611]  [<ffffffff810860f6>] kthread+0x96/0xa0
[  480.833614]  [<ffffffff810141aa>] child_rip+0xa/0x20
[  480.833617]  [<ffffffff81086060>] ? kthread+0x0/0xa0
[  480.833619]  [<ffffffff810141a0>] ? child_rip+0x0/0x20