Without further details there is no guarantee that this is caused by GPFS (in
such cases a dump analysis is usually needed to find the root cause).
But scanning this log message for gpfs and mmfs tells me that gpfs is installed,
hence it's user space daemon (mmfsd) is running and (more importantly) the
kernel module (mmfslinux) is active.
Third party kernel modules can cause issues, since they are usually developed
towards a certain kernel version, and tend to start failing while the kernel
evolves, hence the kernel is marked as "Tainted".
So this tells me that not the entire kernel/module combination that's running
is pristine Ubuntu.
We usually ask to recreate this in a pristine Ubuntu environment (not
having a tainted kernel).
In addition I see the gpfs module listed in the call trace again (in
combination with (ksys_lseek) which is another indicator:
[645967.290048] ([<001fffff80a8d2ca>] gpfs_f_llseek+0x4a/0x280 [mmfslinux])
[645967.290053] [<00000001d75f5ed2>] ksys_lseek
The error/crash message provides just an overview - a look at the full
logs might be helpful.
Was the folder /var/crash checked for any content as well as the GPFS
logs (/var/adm/ras)?
And as already stated, it needs to be ensured that the system is on the latest
(supported) level.
If its not the case, the situation needs to be recreated on the latest, hence
currently supported level:
This "sudo apt update && apt-cache policy linux-generic"
will show your current kernel ('Installed'), but also where you should be
("Candidate").
( This btw. would also apply to GPFS itself (being on the latest level):
http://files.gpfsug.org/presentations/2017/NERSC/GPFS-Troubleshooting-Apr-2017.pdf
#22)
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https://bugs.launchpad.net/bugs/1929923
Title:
[UBUNTU 20.04] LPAR becomes unresponsive after the Kernel panic -
rq_qos_wake_function
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