Server reboot stucked due to unkillable mhvtl (SCSI Target: 15) about mhvtl

[markh794]

Thanks for the bug report.

I'm on holidays without access to a computer for next 3 weeks.

Looks like the kernel module oops, so when user space daemons call ioctl(), it never returns. daemons won't receive kill signal until the syscall() returns - hence are unkillable

I'll look into it more when back from leave.

Any chance for 'uname -r' as well

[smajl87]

root@sp02:~# uname -r
5.4.0-125-generic
root@sp02:~# uname -a
Linux sp02 5.4.0-125-generic #141-Ubuntu SMP Wed Aug 10 13:42:03 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

[markh794]

A look over the kernel module src (kernel/mhvtl.c) line 331 show SCSI ID 15 assigned to the mhvtl hba.

https://github.com/markh794/mhvtl/blob/master/kernel/mhvtl.c

.this_id = 15

Try commenting out this line (leave unassigned) or set to a large value such as 4096 and recompile the kernel module.

I'll try it out when back in front of a computer (in the next couple of weeks)

[markh794]

Commit 4f36ea7 will fix this.
Please re-open the bug report if you encounter similar issues with this patch applied.
Thanks, Mark