05 example failed on ubuntu20.04 server with invalid argument error about io_uring-by-example HOT 6 CLOSED

it works after I update kernel to 5.8. :)

from io_uring-by-example.

Hello,

Looks like you're running this on Windows Services for Linux (WSL). I'm not sure it supports io_uring. Can you confirm if you are running this on WSL Ubuntu or you're running this inside of a Linux virtual machine?

from io_uring-by-example.

no, I run on Xeon HW, you see Visual Studio because I use Visual Studio remote debug feature to debug the application running in the linux. it is not WSL. for sure. :)

I run this on Ubuntu server 20.04.

from io_uring-by-example.

any thing I can do?

from io_uring-by-example.

Hello,

I see from your uname output that your kernel is v5.4. However, according to liburing documentation for the accept operation, support for accept was added in kernel v5.5. That's the problem. You can run the probe.c example program from Lord of the io_uring example programs repo to determine which io_uring operations your kernel supports.

Tip: You can use Arch Linux which usually runs the most recent kernels, or you can install more recent kernels on Ubuntu as well. Make sure you run the probe program to see if all required features to run an example are supported by your running kernel.

Hope that helps!

from io_uring-by-example.

@shuveb Yes, you are right. I will install latest kernel with one VM to test again.

intel@wcp116:/wayne/loti-examples/build$ sudo ./probe
[sudo] password for intel:
You are running kernel version: 5.4.0-42-generic
This program won't work on kernel versions earlier than 5.6
Report of your kernel's list of supported io_uring operations:
Segmentation fault
intel@wcp116:/wayne/loti-examples/build$

from io_uring-by-example.