group.of.nepali.translators team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Package changed: linux-lts-xenial (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: New => Triaged

** Changed in: linux (Ubuntu)
   Importance: Medium => High

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => High

** Tags added: kernel-da-key xenial

-- 
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1645187

Title:
  4.4.0-47-generic dm_snapshot random deadlock

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Server's load become high with tasks in D state, no choice but to reboot the system.
  Could be related to the following ? :

  https://bugzilla.kernel.org/show_bug.cgi?id=119841
  https://www.redhat.com/archives/dm-devel/2016-June/msg00399.html
  https://patchwork.kernel.org/patch/9223697/
  https://xen.crc.id.au/bugs/view.php?id=75

  ii  xen-hypervisor-4.4-amd64             4.4.2-0ubuntu0.14.04.7            amd64        Xen Hypervisor on AMD64
  ii  linux-image-extra-4.4.0-47-generic   4.4.0-47.68~14.04.1               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
  ii  linux-image-4.4.0-47-generic         4.4.0-47.68~14.04.1               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP

  kernel messages:
  ----------------
  [890070.994700] INFO: task blkback.3.xvda2:5756 blocked for more than 120 seconds.
  [890070.994758]       Not tainted 4.4.0-47-generic #68~14.04.1-Ubuntu 
  [890070.994806] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [890070.994884] blkback.3.xvda2 D ffff8800b7ff3928     0  5756      2 0x00000000
  [890070.994890]  ffff8800b7ff3928 ffffffff81e13500 ffff8800b6a4be80 ffff8800b7ff4000
  [890070.994895]  ffff88013a83cc18 ffff88013a83cc00 ffffffff00000000 fffffffe00000001
  [890070.994898]  ffff8800b7ff3940 ffffffff817fafc5 ffff8800b6a4be80 ffff8800b7ff39c0
  [890070.994902] Call Trace:
  [890070.994912]  [<ffffffff817fafc5>] schedule+0x35/0x80
  [890070.994917]  [<ffffffff817fd46a>] rwsem_down_write_failed+0x1da/0x320
  [890070.994923]  [<ffffffff81689577>] ? push+0x47/0x50
  [890070.994927]  [<ffffffff81689f07>] ? dm_kcopyd_copy+0x147/0x1f0
  [890070.994931]  [<ffffffff813e6a53>] call_rwsem_down_write_failed+0x13/0x20
  [890070.994933]  [<ffffffff817fcd7d>] ? down_write+0x2d/0x40
  [890070.994939]  [<ffffffffc0314dae>] __origin_write+0x6e/0x210 [dm_snapshot]
  [890070.994944]  [<ffffffff81185625>] ? mempool_alloc_slab+0x15/0x20
  [890070.994946]  [<ffffffff8118574f>] ? mempool_alloc+0x5f/0x150
  [890070.994949]  [<ffffffffc0314fb7>] do_origin.isra.14+0x67/0x90 [dm_snapshot]
  [890070.994952]  [<ffffffffc0315042>] origin_map+0x62/0x80 [dm_snapshot]
  [890070.994955]  [<ffffffff8167f2da>] __map_bio+0x3a/0x110
  [890070.994957]  [<ffffffff816809c0>] __split_and_process_bio+0x240/0x3c0
  [890070.994960]  [<ffffffff81680baa>] dm_make_request+0x6a/0xd0
  [890070.994964]  [<ffffffff813aa221>] generic_make_request+0xe1/0x1a0 
  [890070.994968]  [<ffffffff813aa357>] submit_bio+0x77/0x150
  [890070.994971]  [<ffffffff813a1c71>] ? bio_alloc_bioset+0x181/0x2a0
  [890070.994977]  [<ffffffffc02c6a1d>] dispatch_rw_block_io+0x4fd/0x9b0 [xen_blkback]
  [890070.994981]  [<ffffffff8101c244>] ? xen_load_sp0+0x84/0x180
  [890070.994985]  [<ffffffffc02c70c5>] __do_block_io_op+0x1f5/0x650 [xen_blkback]
  [890070.994990]  [<ffffffff810e5e18>] ? del_timer_sync+0x48/0x50
  [890070.994993]  [<ffffffff817fd8ab>] ? schedule_timeout+0x16b/0x2d0
  [890070.994997]  [<ffffffffc02c7880>] xen_blkif_schedule+0xd0/0x820 [xen_blkback]
  [890070.995002]  [<ffffffff810a4e1a>] ? finish_task_switch+0x7a/0x290
  [890070.995004]  [<ffffffff817fa969>] ? __schedule+0x359/0x980
  [890070.995010]  [<ffffffff810bde70>] ? prepare_to_wait_event+0xf0/0xf0
  [890070.995014]  [<ffffffffc02c77b0>] ? xen_blkif_be_int+0x30/0x30 [xen_blkback]
  [890070.995018]  [<ffffffff8109ba29>] kthread+0xc9/0xe0
  [890070.995021]  [<ffffffff8109b960>] ? kthread_park+0x60/0x60
  [890070.995025]  [<ffffffff817febcf>] ret_from_fork+0x3f/0x70
  [890070.995027]  [<ffffffff8109b960>] ? kthread_park+0x60/0x60

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1645187/+subscriptions