fsck: to repair or not to repair

[Nikolaus Rath <Nikolaus@rath.org>]

Hello,

I recently ran btrfsck on one of my file systems, and got the following
messages:

checking extents
checking free space cache
checking fs roots
root 5 inode 3149867 errors 400, nbytes wrong
root 5 inode 3150237 errors 400, nbytes wrong
root 5 inode 3150238 errors 400, nbytes wrong
root 5 inode 3150242 errors 400, nbytes wrong
root 5 inode 3150260 errors 400, nbytes wrong
[ lots of similar message with different inode numbers ]
root 5 inode 15595011 errors 400, nbytes wrong
root 5 inode 15595016 errors 400, nbytes wrong
Checking filesystem on /dev/mapper/vg0-nikratio_crypt
UUID: 8742472d-a9b0-4ab6-b67a-5d21f14f7a38
found 263648960636 bytes used err is 1
total csum bytes: 395314372
total tree bytes: 908644352
total fs tree bytes: 352735232
total extent tree bytes: 95039488
btree space waste bytes: 156301160
file data blocks allocated: 675209801728
 referenced 410351722496
Btrfs v3.17



Can someone explain to me the risk that I run by attempting a repair,
and (conversely) what I put at stake when continuing to use this file
system as-is?


Best,
-Nikolaus

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