How to use NVMeVirt to implement ZNSwap?

[Shunyinghappyday]

Hello, @shaiberg1 ~~

I want to use NVMeVirt to implement ZNSwap

VM RAM : 16GB (VirtualBox & Ubuntu22.04)

1. In NVMeVirt
   Memmap : 4GB(Start), 6GB(Offset)
   ZNS SSD size : 4GB
   Zone size : 128MB
   

2. In ZNSwap (I do the following command)
   sudo swapoff /swapfile
sudo systcl vm.swappiness=100
sudo nvme zns reset-zone -a /dev/nvme0n1
echo 10 | sudo tee /sys/kernel/mm/zns_swap/nr_swap_zones : Swap zone = 10(Total = 1280MB)
   echo 3 | sudo tee /sys/kernel/mm/zns_swap/zns_policy
sudo mkswap /dev/nvme0n1
sudo swapon /dev/nvme0n1
   

3. Use htop to monitor the usage of swap when I run GCN code

Problem :
I don't know why it keeps only using 4k swap space and it crashes my system when I run GCN code.

How can i solve it?
Please let me know, thanks!!!