All empty or still-delalloced files.

[devZer0]

i'm getting

root@pve-test1:/btrfs# compsize /btrfs/zstd/
All empty or still-delalloced files.

what does "still-delalloced" mean ?

looks like a typo to me !?

[SaltyKitkat]

In the Btrfs filesystem, "delalloc" refers to a delayed allocation state, which means the data of the file has not yet been allocated and written to disk but is temporarily stored in memory. This state typically occurs when the filesystem is optimizing write operations, where the system first caches the data in memory and performs disk writes at a later time. This helps improve performance but can also result in the file not actually occupying space on disk.

[DeflateAwning]

If you get this message, and immediately want a result, you can use the sync command to write out to disk (and then rerun compsize).

By default, this sync operation happens after 30 seconds (or as long as a few minutes in some distros).