Why fstrim with --quiet-unsupported fails on a vxfs, as compared to other filesystems?

Solution Verified - Updated 2025-02-25T16:16:47+00:00 -

Issue

If fstrim is used with --quiet-unsupported, which is included from RHEL 9 and above, it doesn't work as expected. fstrim doesn't ignore the error, as it was supposed to.
```
fstrim: /path/to/FS: FITRIM ioctl failed: Invalid argument
```
If tested on another filesystem, which doesn't support discard operations, such as NFS, tmpfs, no errors are observed.
Why is this issue occurring for only vxfs?

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