Hi Robert,
I also see this issue, but this is not the only code path can trigger
this problem, I think you may also see iscsi_np in D status. I fixed one
code path whitch still not merged to mainline. I will forward you my
patch later. Note: my patch only fixed one code path, you may see other
call statck with D status.
Thanks,
BR
Zhu Lingshan
在 2016/10/1 1:14, Robert LeBlanc 写道:
We are having a reoccurring problem where iscsi_trx is going into D
state. It seems like it is waiting for a session tear down to happen
or something, but keeps waiting. We have to reboot these targets on
occasion. This is running the 4.4.12 kernel and we have seen it on
several previous 4.4.x and 4.2.x kernels. There is no message in dmesg
or /var/log/messages. This seems to happen with increased frequency
when we have a disruption in our Infiniband fabric, but can happen
without any changes to the fabric (other than hosts rebooting).
# ps aux | grep iscsi | grep D
root 4185 0.0 0.0 0 0 ? D Sep29 0:00 [iscsi_trx]
root 18505 0.0 0.0 0 0 ? D Sep29 0:00 [iscsi_np]
# cat /proc/4185/stack
[<ffffffff814cc999>] target_wait_for_sess_cmds+0x49/0x1a0
[<ffffffffa087292b>] isert_wait_conn+0x1ab/0x2f0 [ib_isert]
[<ffffffff814f0de2>] iscsit_close_connection+0x162/0x840
[<ffffffff814df8df>] iscsit_take_action_for_connection_exit+0x7f/0x100
[<ffffffff814effc0>] iscsi_target_rx_thread+0x5a0/0xe80
[<ffffffff8109c6f8>] kthread+0xd8/0xf0
[<ffffffff8172004f>] ret_from_fork+0x3f/0x70
[<ffffffffffffffff>] 0xffffffffffffffff
# cat /proc/18505/stack
[<ffffffff814f0c71>] iscsit_stop_session+0x1b1/0x1c0
[<ffffffff814e2436>] iscsi_check_for_session_reinstatement+0x1e6/0x270
[<ffffffff814e4df0>] iscsi_target_check_for_existing_instances+0x30/0x40
[<ffffffff814e4f40>] iscsi_target_do_login+0x140/0x640
[<ffffffff814e62dc>] iscsi_target_start_negotiation+0x1c/0xb0
[<ffffffff814e402b>] iscsi_target_login_thread+0xa9b/0xfc0
[<ffffffff8109c6f8>] kthread+0xd8/0xf0
[<ffffffff8172004f>] ret_from_fork+0x3f/0x70
[<ffffffffffffffff>] 0xffffffffffffffff
What can we do to help get this resolved?
Thanks,
----------------
Robert LeBlanc
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