As "FreeBSD 12.2-RELEASE Release Notes" shows:
Does this only support FreeBSD guests?
On the following guests with virtio-blk+zvol backends, I tested whether the free space can be reclaimed automatically after deleting some files:
1. FreeBSD 12.2R UFS: Yes
2. FreeBSD 12.2R ZFS: Yes
3. CentOS 7.9.2009 XFS: No
4. Windows 10 20H2 NTFS: No
The virtio_blk(4) driver has been updated to support TRIM. [r365702] (Sponsored by Klara Systems)
Does this only support FreeBSD guests?
On the following guests with virtio-blk+zvol backends, I tested whether the free space can be reclaimed automatically after deleting some files:
1. FreeBSD 12.2R UFS: Yes
2. FreeBSD 12.2R ZFS: Yes
3. CentOS 7.9.2009 XFS: No
4. Windows 10 20H2 NTFS: No