Btrfs devel - Sep 2014 - BTRFS critical (device dm-0): invalid dir item name len: 45389

Hi.

When I traverse one of my btrfs, for example with a simple "find /", I
get the following in kmsg

BTRFS critical (device dm-0): invalid dir item name len: 45389

The message appears just one time (so I guess it involves just one
file/dir). dm-0 is the first dmcrypt device of a pair on which I have
btrfs in RAID0 (btrfs native raid). Though I can't be 100% sure, this
seems to be a very recent problem (I would have noticed something
"critical" in kmsg if it happened before). Everything else seems to
work fine.

So, should I be worried. Is there a way to fix this? (I assume that a
scrub would not do any good since it seems to be related to btrfs data
structures more than actual file data). Is there at least a way to
know which file/dir is involved? Maybe a verbose debug mode? Or maybe
I should just add some printk in the verify_dir_item function that
seems to generate the message.

Thanks
John
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