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
Status in Ubuntu on IBM z Systems:
Invalid
Status in linux package in Ubuntu:
Invalid
Bug description:
---Problem Description---
kernel panic rq_qos_wake_function
---uname output---
Linux version 5.4.0-71-generic
Machine Type = s390x
---Debugger---
A debugger is not configured
Stack trace output:
May 15 20:21:04 data1 kernel: Call Trace:
May 15 20:21:04 data1 kernel: ([<000000234091e670>] 0x234091e670)
May 15 20:21:04 data1 kernel: [<0000003e10047e3a>]
rq_qos_wake_function+0x8a/0xa0
May 15 20:21:04 data1 kernel: [<0000003e0fbec482>]
__wake_up_common+0xa2/0x1b0
May 15 20:21:04 data1 kernel: [<0000003e0fbec984>]
__wake_up_common_lock+0x94/0xe0
May 15 20:21:04 data1 kernel: [<0000003e0fbec9fa>] __wake_up+0x2a/0x40
May 15 20:21:04 data1 kernel: [<0000003e1005ee70>] wbt_done+0x90/0xe0
May 15 20:21:04 data1 kernel: [<0000003e10047f42>] __rq_qos_done+0x42/0x60
May 15 20:21:04 data1 kernel: [<0000003e10033cb0>]
blk_mq_free_request+0xe0/0x140
May 15 20:21:04 data1 kernel: [<0000003e101d46f0>]
dm_softirq_done+0x140/0x230
May 15 20:21:04 data1 kernel: [<0000003e100326c0>]
blk_done_softirq+0xc0/0xe0
May 15 20:21:04 data1 kernel: [<0000003e103fc084>] __do_softirq+0x104/0x360
May 15 20:21:04 data1 kernel: [<0000003e0fb9da1e>] irq_exit+0x9e/0xc0
May 15 20:21:04 data1 kernel: [<0000003e0fb28ae8>] do_IRQ+0x78/0xb0
May 15 20:21:04 data1 kernel: [<0000003e103fb588>]
ext_int_handler+0x130/0x134
May 15 20:21:04 data1 kernel: [<0000003e101d4416>] dm_mq_queue_rq+0x36/0x1d0
May 15 20:21:04 data1 kernel: Last Breaking-Event-Address:
May 15 20:21:04 data1 kernel: [<0000003e0fbce75e>] wake_up_process+0xe/0x20
May 15 20:21:04 data1 kernel: Kernel panic - not syncing: Fatal exception in
interrupt
Oops output:
no
System Dump Info:
The system was configured to capture a dump, however a dump was not
produced.
-Attach sysctl -a output output to the bug.
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