Re: kernel BUG at fs/btrfs/extent-tree.c:8113! (4.1.3 kernel)

[Marc MERLIN <marc@merlins.org>]

On Tue, Aug 25, 2015 at 10:51:00AM +0800, Qu Wenruo wrote:
> Patches sent and CCed to you.
> 
> Please try the two patches and see what's new.
> This time, I think the output will be much larger.

Indeed.

However the bad news is that gen 39538 is the highest.
Should I force btrfsck to work with an older generation, or do we throw the towel and stop bothering
trying to rescue this FS longer (it's a backup FS, so I have no data I need to recover on it, I just curious
on how it managed to corrupt itself when all I did was a weekly backup to it via btrfs send/receive.

myth:~# sort  -rn -k +4  /var/spool/out  |head -20
Well block 29523968(gen: 39538 level: 1) seems good, and it matches superblock
Well block 29687808(gen: 39537 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 93749248(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 60669952(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 30474240(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 29540352(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 150880256(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 150568960(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 150552576(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 150519808(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 150503424(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 141410304(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 136347648(gen: 39536 level: 0) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7312195813376(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7312194404352(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7312086122496(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7312079536128(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7311940960256(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7311866003456(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1
Well block 7311839477760(gen: 39535 level: 1) seems good, but generation/level doesn't match, want gen: 39538 level: 1

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901