[  137.819651] EXT4-fs (sdg1): recovery complete
[  137.820231] EXT4-fs (sdg1): mounted filesystem with ordered data mode. Opts: (null)
[  188.213294] JBD: barrier-based sync failed on sdg1-8 - disabling barriers
[55035.892509] hrtimer: interrupt took 60005196 ns
[394565.670057] INFO: task flush-202:97:1047 blocked for more than 120 seconds.
[394565.670074] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[394565.670081] flush-202:97  D ffff880003dce980     0  1047      2 0x00000000
[394565.670087]  ffff8801d6dbf620 0000000000000246 ffff880100000e58 0000000000015980
[394565.670092]  ffff8801d6dbffd8 0000000000015980 ffff8801d6dbffd8 ffff8801d6db2dc0
[394565.670095]  0000000000015980 0000000000015980 ffff8801d6dbffd8 0000000000015980
[394565.670100] Call Trace:
[394565.670114]  [<ffffffff815a2173>] io_schedule+0x73/0xc0
[394565.670120]  [<ffffffff812a2f3c>] get_request_wait+0xcc/0x1a0
[394565.670125]  [<ffffffff8107f080>] ? autoremove_wake_function+0x0/0x40
[394565.670130]  [<ffffffff8129ccd7>] ? elv_merge+0x1d7/0x210
[394565.670133]  [<ffffffff812a30a3>] __make_request+0x93/0x4b0
[394565.670137]  [<ffffffff81006adf>] ? __raw_callee_save_xen_restore_fl+0x11/0x1e
[394565.670140]  [<ffffffff812a1c83>] generic_make_request+0x1b3/0x540
[394565.670146]  [<ffffffff81102cc5>] ? mempool_alloc_slab+0x15/0x20
[394565.670151]  [<ffffffff811ec861>] ? ext4_mark_iloc_dirty+0x71/0x90
[394565.670154]  [<ffffffff812a2092>] submit_bio+0x82/0x110
[394565.670158]  [<ffffffff8117c269>] submit_bh+0xf9/0x140
[394565.670162]  [<ffffffff8117e240>] __block_write_full_page+0x1d0/0x3b0
[394565.670164]  [<ffffffff8117dab0>] ? end_buffer_async_write+0x0/0x190
[394565.670168]  [<ffffffff811ee800>] ? noalloc_get_block_write+0x0/0x30
[394565.670171]  [<ffffffff811ee800>] ? noalloc_get_block_write+0x0/0x30
[394565.670173]  [<ffffffff8117ed50>] block_write_full_page_endio+0xe0/0x120
[394565.670176]  [<ffffffff811e9ed0>] ? ext4_bh_delay_or_unwritten+0x0/0x30
[394565.670179]  [<ffffffff8117eda5>] block_write_full_page+0x15/0x20
[394565.670182]  [<ffffffff811ed3c3>] ext4_writepage+0x1d3/0x380
[394565.670185]  [<ffffffff811eb1dc>] mpage_da_submit_io+0x14c/0x1c0
[394565.670188]  [<ffffffff811ef7e3>] ? mpage_da_map_blocks+0x1c3/0x370
[394565.670191]  [<ffffffff811f0395>] ext4_da_writepages+0x4f5/0x640
[394565.670195]  [<ffffffff8110a791>] do_writepages+0x21/0x40
[394565.670200]  [<ffffffff81175356>] writeback_single_inode+0xe6/0x3f0
[394565.670203]  [<ffffffff81175ab5>] writeback_sb_inodes+0x195/0x280
[394565.670206]  [<ffffffff811762d0>] writeback_inodes_wb+0xa0/0x1b0
[394565.670209]  [<ffffffff8117662b>] wb_writeback+0x24b/0x2b0
[394565.670212]  [<ffffffff8117680c>] wb_do_writeback+0x17c/0x190
[394565.670217]  [<ffffffff8106ffd0>] ? process_timeout+0x0/0x10
[394565.670220]  [<ffffffff81176873>] bdi_writeback_task+0x53/0x160
[394565.670223]  [<ffffffff8107ef47>] ? bit_waitqueue+0x17/0xd0
[394565.670228]  [<ffffffff81119cb6>] bdi_start_fn+0x86/0x100
[394565.670231]  [<ffffffff81119c30>] ? bdi_start_fn+0x0/0x100
[394565.670233]  [<ffffffff8107eb26>] kthread+0x96/0xa0
[394565.670238]  [<ffffffff8100aee4>] kernel_thread_helper+0x4/0x10
[394565.670242]  [<ffffffff815a465d>] ? retint_restore_args+0x5/0x6
[394565.670244]  [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10
[394565.670282] INFO: task jbd2/sdg1-8:1824 blocked for more than 120 seconds.
[394565.670289] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[394565.670295] jbd2/sdg1-8   D ffff880003dce980     0  1824      2 0x00000000
[394565.670299]  ffff8801d77f3a50 0000000000000246 0000000000000000 0000000000015980
[394565.670303]  ffff8801d77f3fd8 0000000000015980 ffff8801d77f3fd8 ffff8801d70e2dc0
[394565.670306]  0000000000015980 0000000000015980 ffff8801d77f3fd8 0000000000015980
[394565.670310] Call Trace:
[394565.670313]  [<ffffffff81100ac0>] ? sync_page+0x0/0x50
[394565.670316]  [<ffffffff815a2173>] io_schedule+0x73/0xc0
[394565.670319]  [<ffffffff81100afd>] sync_page+0x3d/0x50
[394565.670321]  [<ffffffff815a27ef>] __wait_on_bit+0x5f/0x90
[394565.670324]  [<ffffffff81100cb3>] wait_on_page_bit+0x73/0x80
[394565.670327]  [<ffffffff8107f0c0>] ? wake_bit_function+0x0/0x40
[394565.670330]  [<ffffffff8110b5d5>] ? pagevec_lookup_tag+0x25/0x40
[394565.670333]  [<ffffffff8110a503>] write_cache_pages+0x193/0x3d0
[394565.670336]  [<ffffffff81109400>] ? __writepage+0x0/0x40
[394565.670340]  [<ffffffff810d1244>] ? __delayacct_blkio_end+0x34/0x60
[394565.670343]  [<ffffffff81006adf>] ? __raw_callee_save_xen_restore_fl+0x11/0x1e
[394565.670346]  [<ffffffff81006b1b>] ? __raw_callee_save_xen_irq_enable+0x11/0x26
[394565.670349]  [<ffffffff8110a764>] generic_writepages+0x24/0x30
[394565.670355]  [<ffffffff81227a37>] journal_submit_data_buffers+0xb7/0x170
[394565.670359]  [<ffffffff812280dc>] jbd2_journal_commit_transaction+0x30c/0x1350
[394565.670363]  [<ffffffff815a40ce>] ? _raw_spin_unlock_irqrestore+0x1e/0x30
[394565.670366]  [<ffffffff81070933>] ? try_to_del_timer_sync+0x83/0xe0
[394565.670370]  [<ffffffff8122d87d>] kjournald2+0xbd/0x220
[394565.670373]  [<ffffffff8107f080>] ? autoremove_wake_function+0x0/0x40
[394565.670376]  [<ffffffff8122d7c0>] ? kjournald2+0x0/0x220
[394565.670378]  [<ffffffff8107eb26>] kthread+0x96/0xa0
[394565.670381]  [<ffffffff8100aee4>] kernel_thread_helper+0x4/0x10
[394565.670384]  [<ffffffff815a465d>] ? retint_restore_args+0x5/0x6
[394565.670387]  [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10
[394565.670399] INFO: task python:27611 blocked for more than 120 seconds.
[394565.670405] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[394565.670411] python        D ffff880003dec980     0 27611      1 0x00000000
[394565.670415]  ffff880190a01998 0000000000000282 ffff880003ded518 0000000000015980
[394565.670419]  ffff880190a01fd8 0000000000015980 ffff880190a01fd8 ffff8801d4fd5b80
[394565.670422]  0000000000015980 0000000000015980 ffff880190a01fd8 0000000000015980
[394565.670427] Call Trace:
[394565.670430]  [<ffffffff81100ac0>] ? sync_page+0x0/0x50
[394565.670434]  [<ffffffff815a2173>] io_schedule+0x73/0xc0
[394565.670436]  [<ffffffff81100afd>] sync_page+0x3d/0x50
[394565.670439]  [<ffffffff815a269a>] __wait_on_bit_lock+0x5a/0xc0
[394565.670442]  [<ffffffff81100a97>] __lock_page+0x67/0x70
[394565.670444]  [<ffffffff8107f0c0>] ? wake_bit_function+0x0/0x40
[394565.670447]  [<ffffffff811008ce>] ? find_get_page+0x1e/0xa0
[394565.670450]  [<ffffffff811020b2>] find_lock_page+0x52/0x80
[394565.670452]  [<ffffffff8110212a>] grab_cache_page_write_begin+0x4a/0xc0
enki@solaris:~$