NFS v3 - FreeBSD 12 server connection getting timed out on CentOS 8 client

[parv/freebsd]

On Tue, Aug 24, 2021 at 2:20 PM parv/freebsd wrote:

Hi me,

On Sun, Aug 22, 2021 at 8:05 PM parv/freebsd wrote:
>
> (I have rearranged my quoted email)
>
> [CentOS 8 NFS v3 client sometimes prints ...]
>
>> Aug 21 08:31:04 [CLIENT] kernel: watchdog: BUG: soft lockup - CPU#0 stuck
>> for 22s! [kworker/u24:0:672075]
>>
>> Aug 21 08:31:04 [CLIENT] kernel: watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u24:10:672632]
>>
>> ...

> How do I go about investigating or solve this?
>
> ...

> I have collected tcpdump output on both server & client ...
>
>   https://github.com/parv/centos8-nfs3-issue/
>
...

While trying to find if there is an update for CentOS 8 "nfs-utils"
package, I came upon the thread on "linux-nfs" mailing list ...

  CPU lockup in or near new filecache code, 201912,
  https://marc.info/?l=linux-nfs&m=157599524312895&w=2 ;

  a patch, 201912,
  https://marc.info/?l=linux-nfs&m=157609449120027&w=2 ;

  more to come, 202001
  https://marc.info/?l=linux-nfs&m=157807452103938&w=2 ?


Now the question is will the fix be available on CentOS 8 anytime
soon, as above thread was concerned with, AIUI, kernel 5.5 (CentOS 8
kernel is hovering around 4.18)?

Not a FreeBSD issue anymore, however, seems like.


- parv