by the kernel. A read from this file returns uncompressed data. A write to
this file compresses data before storing them on the disk. Note: please
make sure to read the bugs and limitations section at the end of this
-document.
+document. (Note: For btrfs, If the 'c' flag is set, then the 'C' flag
+cannot be set. Also conflicts with btrfs mount option 'nodatasum')
.TP
.B C
A file with the 'C' attribute set will not be subject to copy-on-write
data blocks, it is undefined when the blocks assigned to the file will
be fully stable. If the 'C' flag is set on a directory, it will have no
effect on the directory, but new files created in that directory will
-have the No_COW attribute set.)
+have the No_COW attribute set. If the 'C' flag is set, then the 'c' flag
+cannot be set.)
.TP
.B d
A file with the 'd' attribute set is not a candidate for backup when the