On Thu, Jun 22, 2017 at 10:01:21AM +0800, Qu Wenruo wrote:
> Commit 4751832da990 ("btrfs: fiemap: Cache and merge fiemap extent before
> submit it to user") introduced a warning to catch unemitted cached
> fiemap extent.
>
> However such warning doesn't take the following case into consideration:
>
> 0 4K 8K
> |<---- fiemap range --->|
> |<----------- On-disk extent ------------------>|
With this fix, my filesystem doesn't appear to go in flames yet.
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