On 2019/4/15 下午5:05, Johannes Thumshirn wrote:
> On Mon, Apr 15, 2019 at 01:36:06PM +0800, Qu Wenruo wrote:
>> Commit 8dcddfa048de ("btrfs: Introduce new mount option usebackuproot to
>> replace recovery") deprecates "recovery" mount option in 2016, and it
>> has been 3 years, it should be OK to remove "recovery" mount option.
>>
>> As we're even going to deprecate the successor, "usebackuproot" mount
>> option, there isn't really much need to keep the original option.
> 
> Has it been documented somewhere, when the mount option is due to be finally
> removed?

It is mentioned as deprecated in btrfs(5):
       recovery
           (since: 3.2, default: off, deprecated since: 4.5)

               Note
               this option has been replaced by usebackuproot and should not
               be used but will work on 4.5+ kernels.


The removal date is not mentioned though.

Thanks,
Qu