On Tue, Jun 25, 2019 at 12:58 AM Nikolay Borisov <nborisov@xxxxxxxx> wrote: > > But why are your nocompress files being compressed? $ sudo strace -p 624 -k -t -o sysdjourndstrace.txt https://drive.google.com/open?id=1IspAjQ6b9dVizjqrX4E6ZErzUKH0CQBl Maybe there's a better way to see what's going on. I do see chattr but I don't know the value or the file. I wonder if the original file has +C unset, then it's defragmented which somehow permits btrfs to compress even though unsetting +C on a non-zero length file shouldn't succeed, but then because it's written in a directory with +C the new defragmented file inherits +C and gets no csums even though it's compressed? I'm throwing spaghetti at a wall though. (I know that's not a good way to test spaghetti, so the analogy works perfectly.) -- Chris Murphy
