Re: kernel BUG at fs/btrfs/inode.c:2299

[Maciej Marcin Piechotka <uzytkownik2@gmail.com>]

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1. Once the blank screen happened ot 23:00 UTC instead of 03:00 UTC
2. I tried to disable the caches
3. I tried to rsync via ext3 + btrfs-convert. I noticed something - in
old fs the df looked like:

Data: total=30.01GB, used=28.42GB
System, DUP: total=8.00MB, used=4.00KB
System: total=4.00MB, used=0.00
Metadata, DUP: total=1.00GB, used=199.47MB
Metadata: total=8.00MB, used=0.00

on new one (with ext3 image):
Data: total=33.33GB, used=20.52GB
System: total=32.00MB, used=4.00KB
Metadata: total=16.64GB, used=11.36GB

and without:
Data: total=33.33GB, used=20.04GB
System: total=32.00MB, used=4.00KB
Metadata: total=16.64GB, used=10.88GB

Given that lzo compression was used about 4 GB data difference was
expected (difference depending on mount options on rsynbc). However:

1. What is DUP?
2. Why metadata is so big on convertion from ext3 while data is small
(the sum is about right - 31GB vs 28.5GB)?

Regards

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