fdisk wq causes hung process -

fdisk wq causes hung process

I created a new partition table on a newly plugged in device and it caused fdisk to hang (even force kill does not work).  It also may be a bad drive or some other issue because fdisk -l hangs after the first 2 HDDs (totaly of 8 HDDs on this system):


[1232879.903596] INFO: task fdisk:27176 blocked for more than 120 seconds.
[1232879.903607]       Tainted: P           OE 3.16.0-38-generic #52~14.04.1-Ubuntu
[1232879.903609] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[1232879.903612] fdisk           D ffff88102fd130c0     0 27176  27054 0x00000000
[1232879.903619]  ffff880aaf987d50 0000000000000082 ffff880fff807010 ffff880aaf987fd8
[1232879.903622]  00000000000130c0 00000000000130c0 ffff880f7ec4dbb0 ffff880aaf987e78
[1232879.903626]  ffff880aaf987e80 7fffffffffffffff ffff880fff807010 ffffffff81203970
[1232879.903629] Call Trace:
[1232879.903643]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232879.903649]  [<ffffffff817699f9>] schedule+0x29/0x70
[1232879.903653]  [<ffffffff81768dd9>] schedule_timeout+0x229/0x2a0
[1232879.903657]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232879.903663]  [<ffffffff815d14e5>] ? md_make_request+0xd5/0x220
[1232879.903666]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232879.903671]  [<ffffffff815e6027>] ? dm_request+0x107/0x1a0
[1232879.903674]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232879.903678]  [<ffffffff8176a4f6>] wait_for_completion+0xa6/0x160
[1232879.903683]  [<ffffffff810a1550>] ? wake_up_state+0x20/0x20
[1232879.903688]  [<ffffffff8134f35e>] submit_bio_wait+0x5e/0x70
[1232879.903693]  [<ffffffff8135b4ca>] blkdev_issue_flush+0x5a/0x90
[1232879.903699]  [<ffffffff81267f99>] ext4_sync_fs+0xe9/0x140
[1232879.903702]  [<ffffffff81203990>] sync_fs_one_sb+0x20/0x30
[1232879.903707]  [<ffffffff811d7cb2>] iterate_supers+0xb2/0x110
[1232879.903710]  [<ffffffff81203a95>] sys_sync+0x55/0x90
[1232879.903715]  [<ffffffff8176da4d>] system_call_fastpath+0x1a/0x1f
[1232999.926891] INFO: task fdisk:27176 blocked for more than 120 seconds.
[1232999.926902]       Tainted: P           OE 3.16.0-38-generic #52~14.04.1-Ubuntu
[1232999.926904] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[1232999.926907] fdisk           D ffff88102fd130c0     0 27176  27054 0x00000000
[1232999.926914]  ffff880aaf987d50 0000000000000082 ffff880fff807010 ffff880aaf987fd8
[1232999.926918]  00000000000130c0 00000000000130c0 ffff880f7ec4dbb0 ffff880aaf987e78
[1232999.926921]  ffff880aaf987e80 7fffffffffffffff ffff880fff807010 ffffffff81203970
[1232999.926924] Call Trace:
[1232999.926938]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232999.926945]  [<ffffffff817699f9>] schedule+0x29/0x70
[1232999.926949]  [<ffffffff81768dd9>] schedule_timeout+0x229/0x2a0
[1232999.926952]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232999.926959]  [<ffffffff815d14e5>] ? md_make_request+0xd5/0x220
[1232999.926962]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232999.926967]  [<ffffffff815e6027>] ? dm_request+0x107/0x1a0
[1232999.926971]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1232999.926974]  [<ffffffff8176a4f6>] wait_for_completion+0xa6/0x160
[1232999.926980]  [<ffffffff810a1550>] ? wake_up_state+0x20/0x20
[1232999.926985]  [<ffffffff8134f35e>] submit_bio_wait+0x5e/0x70
[1232999.926989]  [<ffffffff8135b4ca>] blkdev_issue_flush+0x5a/0x90
[1232999.926995]  [<ffffffff81267f99>] ext4_sync_fs+0xe9/0x140
[1232999.926999]  [<ffffffff81203990>] sync_fs_one_sb+0x20/0x30
[1232999.927003]  [<ffffffff811d7cb2>] iterate_supers+0xb2/0x110
[1232999.927007]  [<ffffffff81203a95>] sys_sync+0x55/0x90
[1232999.927011]  [<ffffffff8176da4d>] system_call_fastpath+0x1a/0x1f
[1233119.950269] INFO: task fdisk:27176 blocked for more than 120 seconds.
[1233119.950285]       Tainted: P           OE 3.16.0-38-generic #52~14.04.1-Ubuntu
[1233119.950290] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[1233119.950296] fdisk           D ffff88102fd130c0     0 27176  27054 0x00000000
[1233119.950308]  ffff880aaf987d50 0000000000000082 ffff880fff807010 ffff880aaf987fd8
[1233119.950316]  00000000000130c0 00000000000130c0 ffff880f7ec4dbb0 ffff880aaf987e78
[1233119.950323]  ffff880aaf987e80 7fffffffffffffff ffff880fff807010 ffffffff81203970
[1233119.950330] Call Trace:
[1233119.950350]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1233119.950362]  [<ffffffff817699f9>] schedule+0x29/0x70
[1233119.950370]  [<ffffffff81768dd9>] schedule_timeout+0x229/0x2a0
[1233119.950378]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1233119.950389]  [<ffffffff815d14e5>] ? md_make_request+0xd5/0x220
[1233119.950396]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1233119.950405]  [<ffffffff815e6027>] ? dm_request+0x107/0x1a0
[1233119.950413]  [<ffffffff81203970>] ? do_fsync+0x80/0x80
[1233119.950420]  [<ffffffff8176a4f6>] wait_for_completion+0xa6/0x160
[1233119.950430]  [<ffffffff810a1550>] ? wake_up_state+0x20/0x20
[1233119.950439]  [<ffffffff8134f35e>] submit_bio_wait+0x5e/0x70
[1233119.950447]  [<ffffffff8135b4ca>] blkdev_issue_flush+0x5a/0x90
[1233119.950457]  [<ffffffff81267f99>] ext4_sync_fs+0xe9/0x140
[1233119.950465]  [<ffffffff81203990>] sync_fs_one_sb+0x20/0x30
[1233119.950473]  [<ffffffff811d7cb2>] iterate_supers+0xb2/0x110
[1233119.950481]  [<ffffffff81203a95>] sys_sync+0x55/0x90
[1233119.950490]  [<ffffffff8176da4d>] system_call_fastpath+0x1a/0x1f


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