After resume from suspended state my Ubuntu 20.10 VM can't access to mount tag

[terox]

Hello to everybody

 

I have installed my Ubuntu 20.10 distribution in a VM (in a VirtIO disk) and it works perfectly: graphics card, devices, usb...

But some time ago I observed that, when I suspend my VM and start again (resume) the "unraid mount tag" throught I access to my host storage is completly locked. I mean: from file browser, the directory still with the loading spinner without message; from console, when I try to list or access to directory I have the same results, nothing. No error messages, and no results or any clue about what is happend under the hoods. For example in my terminal:
 

$> ls /mnt/unraid
(...nothing during hours...)

 

May be is related with my fstab configuration, but I am not sure:
 

# /etc/fstab
unraid /mnt/unraid 9p trans=virtio,version=9p2000.L,_netdev,relatime,rw    0    0

 

If I open some dialog in application that reads that directory (/mnt/unraid/**) it automatically locks and is very difficult to kill them. By other hand if I reboot the VM it takes a long time finished the process.

 

When I boot the VM or reboot for a first time it works how I spected, but when I suspend the operating system, the trouble start like I described above.

 

Please if you need some checks or logs I am opened to send them. I want to solve that issue 

 

Thank you so much.

[JonathanM]

Can I ask a favor? I would love for you to benchmark the 9p mount when it's working, then do a cifs mount to the same share and benchmark that.

 

In the past, the cifs mount was a fair amount faster, and less trouble.

[terox]

Hello @jonathanm and thank you for your answer.

 

You mean that I can mount a CIFS with the "mount tag"?

 

I can made a test, but I am not sure if it this the issue because in normal conditions the 9p works with a excellent performance. After all, if I try do an dd command, for example, to benchmark it when it is failing may be the command could be that not work because, now a days, if i try to list the /mnt/ (where it is the mount point) directory, it gets locked without any response.

 

I don't know if is a virtio driver issue from host or from vm.

 

Thank you

Edited May 7, 2021 by terox
Clarifications

[JonathanM]

1 hour ago, terox said:

You mean that I can mount a CIFS with the "mount tag"?

No, mount the share like you would if you were accessing Unraid from a normal PC on the network.