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Date: Fri, 19 Dec 2014 16:47:22 -0500
From: Josef Bacik <jbacik@fb.com>
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To: Tomasz Chmielewski <tch@virtall.com>
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Subject: Re: 3.18.0: kernel BUG at fs/btrfs/relocation.c:242!
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On 12/12/2014 09:37 AM, Tomasz Chmielewski wrote:
> FYI, still seeing this with 3.18 (scrub passes fine on this filesystem).
>
> # time btrfs balance start /mnt/lxc2
> Segmentation fault
>

Ok now I remember why I haven't fix this yet, the images you gave me 
restore but then they don't mount because the extent tree is corrupted 
for some reason.  Could you re-image this fs and send it to me and I 
promise to spend all of my time on the problem until its fixed.  Thanks,

Josef