linux-kernel - NFS trace new to 5.13.0 (GA)

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Date:   Tue, 29 Jun 2021 18:28:38 +0000
From:   "Marciniszyn, Mike" <mike.marciniszyn@...nelisnetworks.com>
To:     Chuck Lever <chuck.lever@...cle.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        "Hillman, Richie" <Richie.Hillman@...nelisnetworks.com>,
        "Dalessandro, Dennis" <dennis.dalessandro@...nelisnetworks.com>,
        "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>
Subject: NFS trace new to 5.13.0 (GA)

During our continuous integration testing on 5.13.0 kernel our testing trips on NFS testing with the following trace on the client:

[32936.156848] INFO: task kworker/9:1:519 blocked for more than 122 seconds.
[32936.165201]       Tainted: G S                5.13.0 #1
[32936.171562] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[32936.180773] task:kworker/9:1     state:D stack:    0 pid:  519 ppid:     2 flags:0x00004000
[32936.190565] Workqueue: events xprt_destroy_cb [sunrpc]
[32936.196854] Call Trace:
[32936.200107]  __schedule+0x38e/0x8b0
[32936.204482]  schedule+0x3c/0xa0
[32936.208464]  schedule_timeout+0x215/0x2b0
[32936.213401]  ? check_preempt_curr+0x3f/0x70
[32936.218518]  ? ttwu_do_wakeup+0x17/0x140
[32936.223336]  wait_for_completion+0x98/0xf0
[32936.228396]  __flush_work+0x128/0x1e0
[32936.232942]  ? worker_attach_to_pool+0xb0/0xb0
[32936.238351]  ? work_busy+0x80/0x80
[32936.242555]  __cancel_work_timer+0x110/0x1a0
[32936.247726]  ? xprt_rdma_bc_destroy+0xc6/0xe0 [rpcrdma]
[32936.254034]  xprt_rdma_destroy+0x15/0x50 [rpcrdma]
[32936.259873]  process_one_work+0x1cb/0x360
[32936.264788]  ? process_one_work+0x360/0x360
[32936.269915]  worker_thread+0x30/0x370
[32936.274436]  ? process_one_work+0x360/0x360
[32936.279526]  kthread+0x116/0x130
[32936.283534]  ? __kthread_cancel_work+0x40/0x40
[32936.288924]  ret_from_fork+0x22/0x30

The same tests and same servers see no such issue from rc4 to rc7, so the failure seems new.

Any thoughts?

I'm currently rerunning rc7 just to be sure.

Mike
External recipient