[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1428045
Title:
CIFS hangs at cifs_oplock_break
Status in linux package in Ubuntu:
Expired
Bug description:
we're having constant issues with CIFS mounts on our Linux terminal
servers (Ubuntu 12.04 and 14.04 with updated kernel). Usually after 1
or 2 days we see the following in dmesg:
[102000.440031] INFO: task cifsiod:2184 blocked for more than 120 seconds.
[102000.441342] Not tainted 3.19.0-7-generic #7-Ubuntu
[102000.441454] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[102000.441617] cifsiod D ffff8800363dfc98 0 2184 2
0x00000000
[102000.441796] Workqueue: cifsiod cifs_oplock_break [cifs]
[102000.442048] ffff8800363dfc98 ffff8800368b09d0 0000000000014200
ffff8800363dffd8
[102000.442215] 0000000000014200 ffff88013ab9bae0 ffff8800368b09d0
0000000000000246
[102000.442382] ffff8800363dfd30 ffff88013ffd7c88 0000000000000002
ffffffff817cb120
[102000.442628] Call Trace:
[102000.442681] [<ffffffff817cb120>] ? bit_wait_io+0x50/0x50
[102000.442828] [<ffffffff817ca4c9>] schedule+0x29/0x70
[102000.442926] [<ffffffff817cb14b>] bit_wait+0x2b/0x50
[102000.443023] [<ffffffff817caca7>] __wait_on_bit+0x67/0x90
[102000.443128] [<ffffffff810a2857>] ? wake_up_process+0x27/0x50
[102000.443240] [<ffffffff817cb120>] ? bit_wait_io+0x50/0x50
[102000.443345] [<ffffffff817cad42>] out_of_line_wait_on_bit+0x72/0x80
[102000.443466] [<ffffffff810b6f70>] ? autoremove_wake_function+0x40/0x40
[102000.443736] [<ffffffffc037689b>] cifs_oplock_break+0x6b/0x330 [cifs]
[102000.443994] [<ffffffff8108f218>] process_one_work+0x158/0x460
[102000.444250] [<ffffffff8108f6ac>] rescuer_thread+0x18c/0x460
[102000.444495] [<ffffffff8108f520>] ? process_one_work+0x460/0x460
[102000.444745] [<ffffffff810950e9>] kthread+0xc9/0xe0
[102000.444975] [<ffffffff81095020>] ? kthread_create_on_node+0x1c0/0x1c0
[102000.445234] [<ffffffff817cf2bc>] ret_from_fork+0x7c/0xb0
[102000.445472] [<ffffffff81095020>] ? kthread_create_on_node+0x1c0/0x1c0
and later
[102000.445739] INFO: task kworker/3:2:20985 blocked for more than 120
seconds.
[102000.446004] Not tainted 3.19.0-7-generic #7-Ubuntu
[102000.446239] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[102000.446657] kworker/3:2 D ffff8800bae87cb8 0 20985 2
0x00000000
[102000.446949] Workqueue: cifsiod cifs_oplock_break [cifs]
[102000.447187] ffff8800bae87cb8 ffff8800baed9d70 0000000000014200
ffff8800bae87fd8
[102000.447613] 0000000000014200 ffff88013abf44b0 ffff8800baed9d70
0000000000000246
[102000.448047] ffff8800bae87d50 ffff88013ffd7c88 0000000000000002
ffffffff817cb120
[102000.448477] Call Trace:
[102000.448659] [<ffffffff817cb120>] ? bit_wait_io+0x50/0x50
[102000.448896] [<ffffffff817ca4c9>] schedule+0x29/0x70
[102000.449127] [<ffffffff817cb14b>] bit_wait+0x2b/0x50
[102000.449360] [<ffffffff817caca7>] __wait_on_bit+0x67/0x90
[102000.449595] [<ffffffff817cb120>] ? bit_wait_io+0x50/0x50
[102000.449834] [<ffffffff817cad42>] out_of_line_wait_on_bit+0x72/0x80
[102000.450085] [<ffffffff810b6f70>] ? autoremove_wake_function+0x40/0x40
[102000.450361] [<ffffffffc037689b>] cifs_oplock_break+0x6b/0x330 [cifs]
[102000.450631] [<ffffffff8108f218>] process_one_work+0x158/0x460
[102000.450907] [<ffffffff8108fef3>] worker_thread+0x53/0x5a0
[102000.451163] [<ffffffff8108fea0>] ? idle_worker_timeout+0x110/0x110
[102000.451834] [<ffffffff810950e9>] kthread+0xc9/0xe0
[102000.452093] [<ffffffff81095020>] ? kthread_create_on_node+0x1c0/0x1c0
[102000.452357] [<ffffffff817cf2bc>] ret_from_fork+0x7c/0xb0
[102000.452601] [<ffffffff81095020>] ? kthread_create_on_node+0x1c0/0x1c0
The same repeats for various other processes like kworker and the hanging
userspace process. This happens with all recent kernel versions (3.13-3.19) and
forces us to reboot the server regularly as the requesting processes always
hang with process state "D" and (I/O) load increases from day to day. Further
information:
Mount options:
sec=krb5,multiuser,mfsymlinks,dir_mode=0700,file_mode=0700,nomapposix,noserverino,nobrl
CIFS server: Samba 4.1.17 with default configuration
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1428045/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
