This is for guest Linux under VMware Workstation.
vmware-toolbox-cmd disk shrink / on btrfs which mounted as
compress=zstd,noatime,nodiratime,space_cache,ssd,discard. However, the image just expanded to maximum size and cannot be shrinked.
It seems compressed btrfs will not write zero file as zeros.
I find there are some ioctl patches on zero-fill at https://email@example.com/.
How can I call
BTRFS_CLEAR_OP_ZERO_NOUNMAP from guest Linux ?