Hey. Just got the following: $ uname -a Linux heisenberg 4.12.0-1-amd64 #1 SMP Debian 4.12.6-1 (2017-08-12) x86_64 GNU/Linux
$ btrfs version btrfs-progs v4.12 on a filesystem: # btrfs check /dev/mapper/data-a2 ; echo $? Checking filesystem on /dev/mapper/data-a2 UUID: f8acb432-7604-46ba-b3ad-0abe8e92c4db checking extents checking free space cache block group 11778977169408 has wrong amount of free space failed to load free space cache for block group 11778977169408 checking fs roots checking csums checking root refs found 4404625739776 bytes used, no error found total csum bytes: 4293007908 total tree bytes: 7511900160 total fs tree bytes: 1856258048 total extent tree bytes: 1097859072 btree space waste bytes: 887753954 file data blocks allocated: 4397113839616 referenced 4515055988736 0 Any idea what could cause these free space issues and how to clean them up? Thought that should work with recent kernels.... could that mean some data will be corrupted when I do e.g. mount with clean_cache? Interestingly, $? is still 0... even though errors were found. And kernel log shows nothing. Cheers, Chris.
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