From: Anton Brekhov <anton.brekhov@rsc-tech.ru>
To: linux-nvme@lists.infradead.org
Subject: NVMe Over Fabrics Disconnect Kernel error
Date: Sat, 28 Mar 2020 09:12:37 +0300 [thread overview]
Message-ID: <CABY-YC7eHFjb-TpKf2ioPJNhZ8RccYsrR-oU=wmt26z9AUNebg@mail.gmail.com> (raw)
Greetings!
We're using nvme-cli technology with ZFS and Lustre Filesystem on top of it.
But we constantly come across a kernel error while disconnecting
remote disks from switched off nodes:
```
[ +0,000089] INFO: task kworker/u593:0:82293 blocked for more than 120 seconds.
[ +0,001959] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[ +0,001941] kworker/u593:0 D ffff90e8493fe2a0 0 82293 2 0x00000080
[ +0,000031] Workqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core]
[ +0,000003] Call Trace:
[ +0,000008] [<ffffffff8177f229>] schedule+0x29/0x70
[ +0,000010] [<ffffffff81358e85>] blk_mq_freeze_queue_wait+0x75/0xe0
[ +0,000007] [<ffffffff810c61c0>] ? wake_up_atomic_t+0x30/0x30
[ +0,000006] [<ffffffff81359cb4>] blk_freeze_queue+0x24/0x50
[ +0,000009] [<ffffffff8134e0ef>] blk_cleanup_queue+0x7f/0x1b0
[ +0,000012] [<ffffffffc031158e>] nvme_ns_remove+0x8e/0xb0 [nvme_core]
[ +0,000011] [<ffffffffc031174b>] nvme_remove_namespaces+0xab/0xf0 [nvme_core]
[ +0,000012] [<ffffffffc03117e2>] nvme_delete_ctrl_work+0x52/0x80 [nvme_core]
[ +0,000008] [<ffffffff810bd0ff>] process_one_work+0x17f/0x440
[ +0,000006] [<ffffffff810be368>] worker_thread+0x278/0x3c0
[ +0,000006] [<ffffffff810be0f0>] ? manage_workers.isra.26+0x2a0/0x2a0
[ +0,000005] [<ffffffff810c50d1>] kthread+0xd1/0xe0
[ +0,000006] [<ffffffff810c5000>] ? insert_kthread_work+0x40/0x40
[ +0,000006] [<ffffffff8178cd1d>] ret_from_fork_nospec_begin+0x7/0x21
[ +0,000006] [<ffffffff810c5000>] ? insert_kthread_work+0x40/0x40
```
Nodes characteristics:
[root@s02p005 ~]# uname -srm
Linux 3.10.0-1062.1.1.el7.x86_64 x86_64
[root@s02p005 ~]# cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
Where're using nvmet_rdma.
Is there any workaround for such error?
Best Regards,
Anton Brekhov.
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next reply other threads:[~2020-03-28 6:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-28 6:12 Anton Brekhov [this message]
2020-03-29 4:14 ` NVMe Over Fabrics Disconnect Kernel error Sagi Grimberg
2020-03-29 8:50 ` Max Gurtovoy
2020-03-29 11:38 ` Anton Brekhov
2020-03-29 11:56 ` Max Gurtovoy
2020-03-29 14:40 ` Anton Brekhov
2020-03-30 4:38 ` Sagi Grimberg
2020-03-30 8:26 ` Anton Brekhov
2020-03-31 13:26 ` Christoph Hellwig
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