Re: dm-thin: commit metadata bug

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On Fri, Aug 05, 2011 at 08:59:09AM -0400, Mikulas Patocka wrote:
> There is a bug in committing metadata --- you can't commit metadata if 
> there is any copying or zeroing in flight. The problem is that in this 
> case, the block you are copying to is already allocated, but it is not 
> linked anywhere in the metadata. So it creates lost blocks in case of 
> crash.

Yes, well known and documented.  We take this hit, fsck will repair.

- Joe

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