Hello,

On two machines I have subvolumes where I backup other hosts' root filesystems
via rsync. These subvolumes have the +c attribute on them.

During the backup, sometimes I get tons of messages like these in dmesg:

[Wed Jul 25 20:58:22 2018] BTRFS error (device dm-8): error inheriting props 
for ino 1213720 (root 1301): -28
[Wed Jul 25 20:58:22 2018] BTRFS error (device dm-8): error inheriting props 
for ino 1213723 (root 1301): -28
[Wed Jul 25 20:58:22 2018] BTRFS error (device dm-8): error inheriting props 
for ino 1213724 (root 1301): -28
[Wed Jul 25 20:58:22 2018] BTRFS error (device dm-8): error inheriting props 
for ino 1213725 (root 1301): -28

# btrfs inspect inode-resolve 1213720 .
./gemini/lib/modules/4.14.58-rm2+/kernel/virt

This seems to be related to the "compression" property in Btrfs:

# btrfs property get ./gemini/lib/modules/4.14.58-rm2+/
compression=zlib

# btrfs property get ./gemini/lib/modules/4.14.58-rm2+/kernel/virt

(no output)

Why would it fail like that? This does seem harmless, but the messages are 
annoying and it's puzzling why 
this happens in the first place.

-- 
With respect,
Roman
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