On 18.02.2021 14:28, Timo Rothenpieler wrote:
> I'll report back once I got a trace log.

Find the trace log attached.
It also grabbed quite a bit of unrelated noise, but I think it's still 
helpful:

>            nfsd-7226  [025] 2228027.306471: nfsd_compound:        xid=0xbca1d6e9 opcnt=5
>             nfsd-7226  [025] 2228027.306472: nfsd_compound_status: op=1/5 OP_SEQUENCE status=0
>             nfsd-7226  [025] 2228027.306479: nfsd_compound_status: op=2/5 OP_PUTFH status=0
>             nfsd-7226  [025] 2228027.306480: nfsd_compound_status: op=3/5 OP_SAVEFH status=0
>             nfsd-7226  [025] 2228027.306483: nfsd_compound_status: op=4/5 OP_PUTFH status=0
>             nfsd-7226  [025] 2228027.306590: nfsd_compound_status: op=5/5 OP_COPY status=0
>             nfsd-7226  [025] 2228027.306702: nfsd_compound:        xid=0xbda1d6e9 opcnt=2
>             nfsd-7226  [025] 2228027.306703: nfsd_compound_status: op=1/2 OP_SEQUENCE status=0
>             nfsd-7226  [025] 2228027.306703: nfsd_compound_status: op=2/2 OP_TEST_STATEID status=0
>             nfsd-7226  [025] 2228027.306741: nfsd_compound:        xid=0xbea1d6e9 opcnt=2
>             nfsd-7226  [025] 2228027.306742: nfsd_compound_status: op=1/2 OP_SEQUENCE status=0
>             nfsd-7226  [025] 2228027.306747: nfsd_compound_status: op=2/2 OP_TEST_STATEID status=0
>             nfsd-7226  [025] 2228027.306791: nfsd_compound:        xid=0xbfa1d6e9 opcnt=2
>             nfsd-7226  [025] 2228027.306792: nfsd_compound_status: op=1/2 OP_SEQUENCE status=0
>             nfsd-7226  [025] 2228027.306793: nfsd_compound_status: op=2/2 OP_TEST_STATEID status=0
>             nfsd-7226  [025] 2228027.306829: nfsd_compound:        xid=0xc0a1d6e9 opcnt=2
>             nfsd-7226  [025] 2228027.306830: nfsd_compound_status: op=1/2 OP_SEQUENCE status=0
>             nfsd-7226  [025] 2228027.306831: nfsd_compound_status: op=2/2 OP_TEST_STATEID status=0
>             nfsd-7226  [025] 2228027.306865: nfsd_compound:        xid=0xc1a1d6e9 opcnt=2
>             nfsd-7226  [025] 2228027.306866: nfsd_compound_status: op=1/2 OP_SEQUENCE status=0
>             nfsd-7226  [025] 2228027.306866: nfsd_compound_status: op=2/2 OP_TEST_STATEID status=0
>            <...>-2019374 [012] 2228027.307694: nfsd_file_put:        hash=0x275 inode=0x0xffffa0c8c35ab490 ref=4 flags=HASHED|REFERENCED may=READ file=0xffffa0e819758800
>            <...>-2019374 [012] 2228027.307694: nfsd_file_put:        hash=0x365 inode=0x0xffffa0d70dd5dec0 ref=5 flags=HASHED|REFERENCED may=READ|WRITE file=0xffffa0e819759000
>            <...>-2019374 [012] 2228027.307701: nfsd_file_put:        hash=0x365 inode=0x0xffffa0d70dd5dec0 ref=4 flags=HASHED|REFERENCED may=READ|WRITE file=0xffffa0e819759000
>            <...>-2019374 [012] 2228027.307701: nfsd_file_put:        hash=0x275 inode=0x0xffffa0c8c35ab490 ref=3 flags=HASHED|REFERENCED may=READ file=0xffffa0e819758800
>            <...>-1885588 [029] 2228027.307725: nfsd_cb_work:         addr=10.110.10.252:0 client 600c8efc:868a6681 procedure=CB_OFFLOAD
>            <...>-1885588 [029] 2228027.307746: nfsd_cb_done:         addr=10.110.10.252:0 client 600c8efc:868a6681 status=-107
>            <...>-1885588 [029] 2228027.307747: nfsd_cb_state:        addr=10.110.10.252:0 client 600c8efc:868a6681 state=FAULT