linux-kernel - NFS oops

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Date:   Fri, 28 Jun 2019 13:22:58 -0600
From:   bob <gillb4@...usplanet.net>
To:     linux-kernel@...r.kernel.org
Subject: NFS oops

Hello.  I know that NFS is undergoing continuing changes and updates and 
don't know if

the oops I'm getting is already on someones todo list.  I run a database 
archive then

  push to a nas box via nfs.  It looks like most of the data arrives, 
but then the file transfer fails to end.

It initially ends like this:

nfs: server 192.168.20.114 not responding, still trying

And then becomes this:

[ 5801.324005] INFO: task cp:5368 blocked for more than 1208 seconds.
[ 5801.324011]       Tainted: G          I       5.2.0-rc6 #1
[ 5801.324013] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" 
disables this message.
[ 5801.324015] cp              D    0  5368   5095 0x00004000
[ 5801.324019] Call Trace:
[ 5801.324030]  ? __schedule+0x284/0x660
[ 5801.324033]  schedule+0x29/0x90
[ 5801.324037]  io_schedule+0x12/0x40
[ 5801.324041]  wait_on_page_bit+0x10e/0x1c0
[ 5801.324044]  ? file_fdatawait_range+0x20/0x20
[ 5801.324047]  __filemap_fdatawait_range+0x8b/0xf0
[ 5801.324050]  filemap_write_and_wait+0x42/0x70
[ 5801.324072]  nfs_wb_all+0x1a/0x120 [nfs]
[ 5801.324076]  filp_close+0x2a/0x70
[ 5801.324078]  __x64_sys_close+0x1e/0x50
[ 5801.324081]  do_syscall_64+0x4f/0x130
[ 5801.324085]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 5801.324088] RIP: 0033:0x7efcd8e908d4
[ 5801.324094] Code: Bad RIP value.
[ 5801.324095] RSP: 002b:00007ffdfc946108 EFLAGS: 00000246 ORIG_RAX: 
0000000000000003
[ 5801.324097] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 
00007efcd8e908d4
[ 5801.324098] RDX: 0000000000020000 RSI: 00007efcd99ac000 RDI: 
0000000000000004
[ 5801.324100] RBP: 00007ffdfc9464e0 R08: 0000000000020000 R09: 
0000000000000001
[ 5801.324101] R10: 0000000000020000 R11: 0000000000000246 R12: 
00007ffdfc9466b0
[ 5801.324102] R13: 0000000000000000 R14: 00007ffdfc946600 R15: 
00007ffdfc9482df

...and the oops repeats

I'm running kernel Linux freedom 5.2.0-rc6 #1 SMP Sun Jun 23 18:31:56 
MDT 2019 x86_64 x86_64 x86_64 GNU/Linux

If you need more info, please reply to me directly as I'm not on the list,

Thanks,

Bob