On Fri, Sep 30, 2016 at 11:14:57AM -0600, Robert LeBlanc wrote: > 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 > PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html Hi, I've encountered the same issue and found a hack to fix it at [1] but I think the correct way for handling this issue would be like you said to tear down the session in case a TASK ABORT times out. Unfortunately I'm not really familiar with the target code myself so I mainly use this reply to get me into the Cc loop. [1] http://marc.info/?l=linux-scsi&m=147282568910535&w=2 -- Johannes Thumshirn Storage jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
